With the March 8 presidential primary contests in the books, it’s looking more and more likely that Donald Trump will be the Republican nominee. He now has 458 delegates, 99 more than Ted Cruz. Betting markets give Trump a 67 percent chance of winning the nomination.

Yet, in a recent CNN poll, 48 percent of Republicans who don’t currently support Trump said they probably wouldn’t vote for him. There is a growing contingent of conservatives who say they would never support Trump. Some have floated the idea of running a conservative candidate as an independent or seeking a third party nomination.