Trump supporter Ben Carson calls for 'civility'
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Ben Carson, who has endorsed Donald TrumpDonald John TrumpGOP lawmakers preparing to vote on bill allowing migrant children to be detained longer than 20 days: report Wasserman Schultz: Infants separated from their parents are in Florida immigrant shelters Ex-White House ethics chief: Sarah Sanders tweet violates ethics laws MORE, is calling for "civility" in the GOP presidential race.

"It's important that we have civility during times of disagreement," Carson, who ended his own bid at the beginning of the month, tweeted Thursday afternoon.

Carson's call comes after a series of attacks by Trump on rival Ted CruzRafael (Ted) Edward CruzSenate left in limbo by Trump tweets, House delays The Hill's Morning Report — Sponsored by PhRMA — Immigration drama grips Washington Senate Gang of Four to meet next week on immigration MORE's wife.

On Tuesday night, Trump threatened to "spill the beans" about Heidi Cruz. The attack came as a response to an ad from an anti-Trump super-PAC that featured Trump's wife, Melania, posing nude.

Late Wednesday night, Trump followed up by sharing a tweet with an image comparing his wife to Cruz's wife and stating "A picture is worth a thousand words."

Cruz angrily shot back at Trump on Thursday, telling him to leave his wife out of the campaign.

"Donald, you're a sniveling coward. Leave Heidi the hell alone," he said.