As Democratic presidential candidates prepare to debate again on Tuesday night, health care proposals are likely to come up, as they did during the November 20 debate. Presidential candidate Sen. Elizabeth Warren, D-Mass., (left) Former vice president Joe Biden and Sen. Bernie Sanders, I-Vt., (right) will be among the candidates debating.

As Democratic presidential candidates prepare to debate again on Tuesday night, health care proposals are likely to come up, as they did during the November 20 debate. Presidential candidate Sen. Elizabeth Warren, D-Mass., (left) Former vice president Joe Biden and Sen. Bernie Sanders, I-Vt., (right) will be among the candidates debating.