Glenn Beck endorses Ted Cruz's White House bid

Conservative radio and television commentator Glenn Beck speaks to a rally of tea party members as they protest against the Internal Revenue Service's targeting of the tea party and similar groups during a rally called "Audit the IRS" outside the U.S. Capitol in Washington June 19, 2013.

Saul Loeb/AFP/Getty Images

Conservative media personality Glenn Beck is endorsing Sen. Ted Cruz's presidential campaign, announcing the news Saturday on social media.

The news comes just days after Sarah Palin -- another conservative firebrand often allied with Beck -- threw her weight behind Cruz's chief rival for the GOP nomination, Donald Trump.

Beck appeared at an Ankeny, Iowa, rally with Cruz on Saturday along with Rep. Steve King and socially conservative activists Bob Vander Plaats and David Barton.

" I am here to announce that I am officially endorsing Ted Cruz," Beck said to loud applause.

Of Beck's endorsement, Cruz said on stage, "Wow. Can you tell that I'm speechless?"

Another rally in Waterloo, Iowa, is expected to feature the Texas senator later in the day. Both events are sponsored by Keep the Promise, the super PAC supporting Cruz.

It's an open question as to how much endorsements from conservative personalities like Palin and Beck can help a candidate, but they do help Cruz and Trump create more buzz in the critical final weeks leading up to the Iowa caucuses.

Earlier this week, after Palin endorsed Trump, Beck wrote on Facebook, "I couldn't disagree with her more."

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Palin and Beck worked together in 2010 to mobilize the tea party movement, but last September Beck said on his radio program that they "had a falling out because she listened to people who were lying to her about me."