Noting the jabs his debate partners were delivering at Saturday's Democratic debate in New Hampshire, Bill Richardson quipped "I've been in hostage negotiations that are a lot more civil than this."
Trying to blunt the appeal of Barack Obama's "change" theme, Hillary Clinton said she has "35 years of experience making change."
John Edwards pounced on Clinton as a defender of the status quo. A CNN/WMUR-TV poll has Obama and Clinton in a front place tie.
Meantime, Republicans are getting testy in New Hampshire.
Mitt Romney and John McCain swapped punches in the GOP
debate Saturday night. Romney blasted McCain's immigration policy.
McCain shot back denying it would amount to amnesty. He said "My
friend, you can spend your whole fortune on these attack ads, but
it still won't be true."
A CNN/WMUR-TV poll has McCain with a 6 percent lead over Romney.
Mitt Romney takes the Wyoming GOP caucuses winning eight of the 12 delegates. Fred Thompson was next with three.