(CNN) - In a campaign season growing more heated by the day, one word keeps making an appearance: chill.
This morning, Sen. Tom Harkin - an undeclared superdelegate - became the latest politician to call for a cooldown, telling reporters on a conference call reported by Radio Iowa that former President Bill Clinton needs to “chill out.”
A local journalist asked about a report of an alleged Clinton “meltdown” during a private meeting with California superdelegates, and asked whether he was doing his wife Hillary Clinton's campaign more harm than good.
"I'm not going to judge that," responded Harkin. "I did say before he ought to chill out a little bit and from what I've seen I think he has, but again this recent thing in California, I don't know."
Harkin isn't the first congressional Democrat to call for a freeze on tough trail talk. Shortly before the Super Tuesday primary contests, Rep. James Clyburn told CNN the former president should lower the temperature on his campaign rhetoric.
“I think they would say in Gullah-Geechee country, he needs to chill a little bit. I hope he understands what that means,” said Clyburn. “I can understand him wanting to defend his wife's honor and his own record, and that is to be expected. But you can't do that in a way that won't engender the kind of feelings that seem to be bubbling up as a result of this.”
But Clinton himself has called for party leaders to put their worries on ice. "There is somehow the suggestion that because we are having a vigorous debate about who would be the best president, we are going to weaken this party in the fall," he said Sunday at the California Democratic Party convention. "Chill out.
"We're going to win this election if we just chill out and let everybody have their say."