The Wisconsin governor isn't letting up in the key early-voting state.
"This country and our government belong to all of us. Enough is enough," he said Saturday.
O'Malley "continues the strange and disastrous agenda of Barack Obama," Palin wrote.
He joins Jeb Bush, Mike Huckabee and others skipping the Iowa campaign tradition.
"Looking forward to discussing strong families and communities," she tweeted.
Hillary Clinton’s presidential campaign scored a major outreach victory late last week.
Fiorina called Hillary a political elite who does not deserve the Oval Office.
"The presidency is not a crown to be passed back and forth by you between two royal families."
Mario Trujillo 05/30/15 11:39 AM EDT
Turnout could be higher in the Ro Khanna-Rep. Mike Honda rematch in California.
O’Malley announced his entry to the contest at a rally in his home city of Baltimore.