Tea party supporters aren’t necessarily enough, of course. Only about 20 percent of Republicans strongly support the tea party. But they participate in politics at high rates, according to research by Christopher Parker and Matt Barreto, and they have a strong presence in Iowa. A similar coalition propelled Rick Santorum to victory in Iowa in 2012, as Lynn Vavreck and I discuss in “The Gamble.” That Cruz’s supporters are so politically active is clearly a problem for Trump, many of whose supporters do not have a track record of voting.
January 24, 2016 at 2:54 PM EST