Assclown Alert is a column of opinion, analysis and snark. Tom Homan, the 30-plus-year immigration enforcement veteran selected to serve as Donald Trump’s “border czar,” has already seized on his boss’ proclivity for bluster and bullshit. During a Fox News appearance last week to discuss the New Year’s Day terror attack in New Orleans and the explosion of a Tesla Cybertruck outside the Trump International Hotel in Las Vegas hours later, Homan claimed without evidence that the second incident must be the work of Islamic jihadists.