A GOP strategist on Sunday explained what he thinks is “the single most important factor in ensuring Trump’s defeat.” Mike Madrid, who served as the Golden State’s GOP political director before co-founding the group of current and former anti-Trump Republicans known as the Lincoln Project, encouraged Nikki Haley to stay in the GOP primary race to weaken the ex-president. The Lincoln project also recently trolled Trump at CPAC using an artificial intelligence ad that mimics his disappointed dad. Specifically, the activist said that Republican primary voters who vote for a candidate other than T…