Sen. Bernie Sanders Bernie SandersNo new taxes for the ultra rich — fix bad tax policy instead Democrats back away from quick reversal of Trump tax cuts The Memo: 2020 is all about winning Florida MORE (I-Vt.) is mocking comments President Trump made at this week's National Prayer Breakfast.

Trump raised eyebrows when he took a break in his speech at the typically somber event to jab Arnold Schwarzenegger.

Sanders said on Twitter that he congratulated Trump "on his deep, spiritual awakening" at the annual event.

Congratulations to President Trump on his deep, spiritual awakening at the National Prayer Breakfast.https://t.co/S740tIWVPR — Bernie Sanders (@SenSanders) February 3, 2017

Sanders pointed to Trump's dig at Schwarzenegger, who hosts the reality TV show "Celebrity Apprentice," during the usually somber event.

"I want to just pray for Arnold, if we can, for those ratings," Trump said during his speech in front of the mixture of politicians and religious leaders.

ADVERTISEMENT White House press secretary Sean Spicer defended Trump's remark, saying it was supposed to be a "lighthearted moment." “He meant it as a lighthearted moment, and if you look at the totality of his remarks, they were absolutely beautiful,” Spicer told reporters.

The comment sparked off a rhetorical back-and-forth between Trump, who formerly hosted the TV show and still has an executive producer credit, and the former California governor.

Trump tweeted on Friday that Schwarzenegger did a "really bad job" as governor, with Schwarzenegger tweeting back a link to a story about him releasing his tax returns — which the president has refused to do.

Democrats also mocked Trump last year when he incorrectly referenced the Second Corinthians book of the Bible during a speech at Liberty University, instead calling it "Two Corinthians."