Colorado Democrats file into Manual High School to cast their vote for their preferred candidate in the Colorado Democratic Party Caucus on March 1, 2016 in Denver, Colorado. Colorado is one of 13 states and one territory participating in Super Tuesday primaries or caucuses intended to award delegates to particular candidates in each party. (Photo by Marc Piscotty/Getty Images)
Voters In Super Tuesday States Cast Their Ballots
Colorado Democrats, including Drew Kennedy (L) and Lia Brune, both of Denver, Colorado, listen to instructions after casting their vote for their preferred candidate in the Colorado Democratic Party Caucus at Manual High School on March 1, 2016 in Denver, Co. Colorado is one of 13 states and one territory participating in Super Tuesday primaries or caucuses intended to award delegates to particular candidates in each party. (Photo by Marc Piscotty/Getty Images)
Voters In Super Tuesday States Cast Their Ballots
Colorado Democrats pack the gym at Manual High School as they listen to caucus instructions before casting their vote for their preferred candidate in the Colorado Democratic Party Caucus on March 1, 2016 in Denver, Co. Colorado is one of 13 states and one territory participating in Super Tuesday primaries or caucuses intended to award delegates to particular candidates in each party. (Photo by Marc Piscotty/Getty Images)
Voters In Super Tuesday States Cast Their Ballots
Precinct Committee Person Paula Singer of Denver, Colorado oversees a precinct meeting to select delegates as Democrats cast their vote for their preferred candidate in the Colorado Democratic Party Caucus at Manual High School on March 1, 2016 in Denver, Co. Colorado is one of 13 states and one territory participating in Super Tuesday primaries or caucuses intended to award delegates to particular candidates in each party. (Photo by Marc Piscotty/Getty Images)
Voters In Super Tuesday States Cast Their Ballots
The scene at a caucus in Loveland in March 2016 (credit: CBS)
Voters In Super Tuesday States Cast Their Ballots
Former Denver Mayor Wellington Webb stumps for candidate Hillary Clinton as Democrats prepare to cast their votes for their preferred candidate in the Colorado Democratic Party Caucus at Manual High School on March 1, 2016 in Denver, Co. Colorado is one of 13 states and one territory participating in Super Tuesday primaries or caucuses intended to award delegates to particular candidates in each party. (Photo by Marc Piscotty/Getty Images)
Super Tuesday In Colorado
Voters line up for the Democratic presidential caucus on Super Tuesday at North High School in Denver, Colorado March 1, 2016. (credit: JASON CONNOLLY/AFP/Getty Images)
Voters In Super Tuesday States Cast Their Ballots
Jeff Neuman-Lee of Denver, Colorado stumps for his candidate Bernie Sanders as Colorado Democrats prepare to cast their votes for their preferred candidate in the Colorado Democratic Party Caucus at Manual High School on March 1, 2016 in Denver, Co. Colorado is one of 13 states and one territory participating in Super Tuesday primaries or caucuses intended to award delegates to particular candidates in each party. (Photo by Marc Piscotty/Getty Images)
Voters In Super Tuesday States Cast Their Ballots
Marie Stahl of Denver, Colorado flashes a smile to a friend in her homemade Bernie Sanders hat prior to her first Colorado Democratic Party Caucus at Manual High School on March 1, 2016 in Denver, Co. Colorado is one of 13 states and one territory participating in Super Tuesday primaries or caucuses intended to award delegates to particular candidates in each party. (Photo by Marc Piscotty/Getty Images)
Super Tuesday In Colorado
Voters participate in the Democratic presidential caucus at North High School in Denver, Colorado on Tuesday, March 1, 2016. Colorado voters are caucusing to decide between Democratic presidential candidates Hillary Clinton and Bernie Sanders. Colorado is one of a dozen states holding "Super Tuesday" presidential caucuses or primaries. (credit: JASON CONNOLLY/AFP/Getty Images)
Voters In Super Tuesday States Cast Their Ballots
David Williams of Denver listens to caucus instructions with others prior to his first Colorado Democratic Party Caucus at Manual High School on March 1, 2016 in Denver, Co. Colorado is one of 13 states and one territory participating in Super Tuesday primaries or caucuses intended to award delegates to particular candidates in each party. (Photo by Marc Piscotty/Getty Images)
Super Tuesday In Colorado
Voters gather for the Democratic presidential caucus at North High School in Denver, Colorado on Tuesday, March 1, 2016. Colorado voters are caucusing to decide between Democratic presidential candidates Hillary Clinton and Bernie Sanders. Colorado is one of a dozen states holding "Super Tuesday" presidential caucuses or primaries. (credit: JASON CONNOLLY/AFP/Getty Images)
Super Tuesday In Colorado
Voters line up for the Democratic presidential caucus on Super Tuesday at North High School in Denver on March 1, 2016. (credit: JASON CONNOLLY/AFP/Getty Images)
Voters In Super Tuesday States Cast Their Ballots
Participants in the Colorado Democratic Party Caucus line up to confirm their voter details before casting their vote for one of the two Democratic candidates at Manual High School on March 1, 2016 in Denver, Colorado. Colorado is one of 13 states and one territory participating in Super Tuesday primaries or caucuses intended to award delegates to particular candidates in each party. (Photo by Marc Piscotty/Getty Images)
Voters In Super Tuesday States Cast Their Ballots
Colorado Democrats pack the gym at Manual High School as they listen to caucus instructions before casting their vote for their preferred candidate in the Colorado Democratic Party Caucus on March 1, 2016 in Denver. (Photo by Marc Piscotty/Getty Images)
Super Tuesday In Colorado
Voters line up for the Democratic presidential caucus on Super Tuesday at North High School in Denver, Colorado March 1, 2016. (credit: JASON CONNOLLY/AFP/Getty Images)
Super Tuesday In Colorado
Voters line up for the Democratic presidential caucus on Super Tuesday at North High School in Denver March 1, 2016. (credit: JASON CONNOLLY/AFP/Getty Images)
Super Tuesday In Colorado
Voters line up for the Democratic presidential caucus at North High School in Denver, Colorado on Tuesday, March 1, 2016. Colorado voters were caucusing to decide between Democratic presidential candidates Hillary Clinton and Bernie Sanders. Colorado is one of a dozen states holding "Super Tuesday" presidential caucuses or primaries. (credit: JASON CONNOLLY/AFP/Getty Images)
Super Tuesday In Colorado
Campaign staffers work at Democratic presidential candidate Senator Bernie Sanders (D-VT) campaign headquarters in Denver on March 1, 2016. (credit: JASON CONNOLLY/AFP/Getty Images)
Super Tuesday In Colorado
Campaign staffers work at Democratic presidential candidate Senator Bernie Sanders (D-VT) campaign headquarters in Denver, Colorado on March 1, 2016. (credit: JASON CONNOLLY/AFP/Getty Images)
Super Tuesday In Colorado
Voters line up for the Democratic presidential caucus at North High School in Denver, Colorado on Tuesday, March 1, 2016. Bernie Sanders defeated Hillary Clinton in four states: Colorado, Minnesota, Oklahoma and his home state of Vermont. (credit: JASON CONNOLLY/AFP/Getty Images)
Super Tuesday In Colorado
Voters participate in the Democratic presidential caucus at North High School in Denver, Colorado on Tuesday, March 1, 2016. Colorado voters are caucusing to decide between Democratic presidential candidates Hillary Clinton and Bernie Sanders. Colorado is one of a dozen states holding "Super Tuesday" presidential caucuses or primaries. (credit: JASON CONNOLLY/AFP/Getty Images)
Super Tuesday In Colorado
Voters participate in the Democratic presidential caucus at North High School in Denver, Colorado on Tuesday, March 1, 2016. Colorado voters are caucusing to decide between Democratic presidential candidates Hillary Clinton and Bernie Sanders. Colorado is one of a dozen states holding "Super Tuesday" presidential caucuses or primaries. (credit: JASON CONNOLLY/AFP/Getty Images)
Voters In Super Tuesday States Cast Their Ballots
A caucus captain tallies votes for his candidate on a sheet of paper as Colorado Democrats cast their vote for their choice in the Colorado Democratic Party Caucus at Manual High School on March 1, 2016 in Denver, Colorado. Colorado is one of 13 states and one territory participating in Super Tuesday primaries or caucuses intended to award delegates to particular candidates in each party. (Photo by Marc Piscotty/Getty Images)
Voters In Super Tuesday States Cast Their Ballots
A Bernie Sanders sticker adorns a car in the parking lot of Manual High School as Colorado Democrats cast their vote for their preferred candidate in the Colorado Democratic Party Caucus at on March 1, 2016 in Denver, Colorado. Colorado is one of 13 states and one territory participating in Super Tuesday primaries or caucuses intended to award delegates to particular candidates in each party. (Photo by Marc Piscotty/Getty Images)
Super Tuesday In Colorado
Voters line up for the Democratic presidential caucus on Super Tuesday at North High School in Denver, Colorado March 1, 2016. (credit: JASON CONNOLLY/AFP/Getty Images)
Voters In Super Tuesday States Cast Their Ballots
Marie Stahl of Denver, Colorado poses for a selfie in her homemade Bernie Sanders hat prior to her first Colorado Democratic Party Caucus at Manual High School on March 1, 2016 in Denver, Co. Colorado is one of 13 states and one territory participating in Super Tuesday primaries or caucuses intended to award delegates to particular candidates in each party. (Photo by Marc Piscotty/Getty Images)
Super Tuesday In Colorado
Voters line up for the Democratic presidential caucus on Super Tuesday at North High School in Denver, Colorado March 1, 2016. (credit: JASON CONNOLLY/AFP/Getty Images)
Super Tuesday In Colorado
Voters line up for the Democratic presidential caucus on Super Tuesday at North High School in Denver, Colorado March 1, 2016. (credit: JASON CONNOLLY/AFP/Getty Images)