Story highlights Sunday night, Nebraska Sen. Ben Sasse asked Trump whether he has "repented" for his "many affairs w/ married women"

The tweets came after Trump attended church services in Iowa on Sunday morning

Marshalltown, Iowa (CNN) Republican Sen. Ben Sasse of Nebraska announced Tuesday he will campaign with two of Donald Trump's rivals for the Republican presidential nomination, just two days after he chastised Trump for his marital infidelities.

As part of an 18-tweet spree on Sunday night, Sasse asked Trump whether he has "repented" for his "many affairs w/ married women."

"@realDonaldTrump Q4: You brag abt many affairs w/ married women. Have you repented? To harmed children & spouses? Do you think it matters?" Sasse asked Trump in a tweet that was retweeted more than 700 times.

.@realDonaldTrump Q4: You brag abt many affairs w/ married women. Have you repented? To harmed children & spouses? Do you think it matters? — Ben Sasse (@BenSasse) January 25, 2016

The tweets came after Trump attended church services in Iowa on Sunday morning. Entering the final stretch in Iowa, where evangelicals are a key portion of the Republican primary electorate, Trump has played up his Christianity and turned to supporters like Jerry Falwell Jr. to boost his religious bona fides.

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