Republican presidential front-runner Donald TrumpDonald TrumpTrump PACs brought in over M for the first half of 2021 Chicago owes Trump M tax refund, state's attorney mounts legal challenge Biden hits resistance from unions on vaccine requirement MORE thinks there's not much he could possibly do to erode his support.

Lauding his fans' loyalty at a campaign event in Sioux Center, Iowa, on Saturday, Trump said he could kill people and still be popular.

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“I have the most loyal people, did you ever see that? I could stand in the middle of Fifth Avenue and shoot people and I wouldn’t lose voters,” he said.  

Trump made the comments as he laid into National Review, the conservative magazine that published a series of essays criticizing him. Those who submitted essays against Trump include Glenn Beck and Brent Bozell, two conservative figures who endorsed GOP presidential rival Ted CruzRafael (Ted) Edward CruzBiden's bipartisan deal faces Senate gauntlet 228 Republican lawmakers urge Supreme Court to overrule Roe v. Wade GOP, Democrats battle over masks in House, Senate MORE

At the speech, Trump floated the prospect of suing Cruz over whether he’s eligible to run for president and also warned that Christianity was under “siege.”