We have now had three defining dynamics in the Republican race: the Bush fizzle that has him now hoping just to get back in the game as perhaps one of three candidates with a shot at the nomination; the Trump ascendancy that has had him leading almost all the polls and driving the debate; and the surge of Ted Cruz, especially in Iowa, but also elsewhere. There are a couple of questions: How high will he go in Iowa before he peaks out (he still has room for growth)? What will a Trump–Cruz clash look like (so far Trump hasn’t shown that he knows how to go after him — yesterday he accused Cruz of not getting along with his Senate colleagues)? Do Trump’s new voters show up when the voting begins (he’s still winning in Iowa in the Fox poll if you take the broadest view of the potential electorate)? Whatever the answers, the campaign has now entered a new phase.