HANOVER, N.H. --Democrats running for president this year probably won't play nice with one another much longer, but they are staying together on issues important to voters, national party Chairman Howard Dean told a Dartmouth College audience Monday.

Dean said the Democratic candidates are united in calling for a change in course in Iraq, health care reform and action to halt the humanitarian crisis in Darfur.

"I do think -- while there are some differences of opinion and while we have a long way to go and it'll get rougher before it gets easier -- the Democrats are presenting a relatively unified front on the key issues Americans care about," he said."