If there is anything that validates Donald Trump’s claim to outsider status in the current presidential race, it’s his threat to sue and force a “do over” of the Iowa caucuses. The real estate developer seems to think this is one of his cockamamie business deals, where everybody sues everybody at the end, then settles so half the participants walk away with money they neither earned nor deserve. Trump is upset because the last Iowa polls—including the highly respected Des Moines Register survey—showed him with a substantial lead on both Ted Cruz and Marco Rubio. Because the polls didn’t predict the ...