CORALVILLE, Iowa (AP) — Donald Trump is pushing his supporters to deliver a blowout win in next month’s Iowa caucuses. A myriad of well-qualified GOP challengers has struggled to gain traction despite crisscrossing the state over the last year. Rival campaigns have spent more than $70 million in Iowa on advertising. And unlike his first time in the caucuses, Trump’s campaign is now run by Iowa veterans who are not just locking in caucus commitments but building a formidable organization to try to lock in his lead. His dominance reflects what one strategist called his “quasi-incumbent” status and his continued support in the GOP base.