The results were similar to those of entrance polls from the disastrous caucuses in Iowa, where 63 percent prioritized beating the president and only 35 percent said that issues were more important.
CNN exit polling also found that some primary voters believed that nominating a woman would make it harder to beat Trump, while most thought it wouldn't matter or would make it easier to beat Trump.
58 percent said it would make no difference, while another 11 percent said nominating a woman would make it easier to defeat Trump.
30 percent said it would make it more difficult to defeat Trump if they nominated a woman.
That might shave a few percentage points of support away from two candidates, Sen. Elizabeth Warren (D-Mass.) and Sen. Amy Klobuchar (D-Minn.).
CNN's Jake Tapper said it was a "harrowing number" for women candidates hoping to get nominated as the Democratic candidate.