"My oh my. Why must campaigns lie?" she wrote.
Palin predicted he'd rebound in New Hampshire and said they hadn't talked about her on the ticket.
"I do think the polls are accurate," said Palin, a Trump supporter.
"You guys don't always keep your promising, evidently," Palin told NBC.
"You should leave our family members out of it," he said. "It's dirty, it's unprincipled."
Josh Earnest said he would not "make light of" the governor's remarks.
Trump said he wanted to foster a dialogue about the trauma faced by returning veterans.
Despite his bitter feud with Trump, John McCain declined to criticize Palin's endorsement.
Beck is a longtime opponent of Cruz's rival Donald Trump.
Democrats wasted no time in attacking the high-profile GOP pairing.
The former Alaska governor is widely expected to endorse Donald Trump.
"I think it would be a blow to Sarah Palin," Cruz's communications director says.
She said there is a "lack of accountability" in the Cruz campaign.
As Trump learned the hard way in Iowa, television coverage can be a two-way street.
"That has to impact how people think," King added.
The eye-grabbing jacket Palin wore was difficult to recreate for "SNL."
McCain has "made up his mind" to wait until the GOP has a nominee.
Trump said Beck's backing of Cruz is a "sad answer" to Palin's endorsement.
The Republican primary has come to completion.
She cited Trump's controversial comments about her father's military service.
"We bend over and say 'thank you, enemy,’ ” Palin said in a jab at the Obama administration.
Trump’s campaign announced the endorsement Tuesday afternoon.
Bristol Palin blasted a "negative knee-jerk reaction" from the Cruz campaign.
The 8,000-square-foot home features a wine cellar and a spa.