House GOP Conference Chairwoman Elise Stefanik is slated to campaign with Donald Trump in New Hampshire later this week, a Trump campaign adviser told CNN, in an appearance that will be viewed by some in the GOP as an audition to become Trump’s running mate. The New York Republican is just one of several speakers who is scheduled to appear on stage ahead of Trump during his event in Concord on Friday, and numerous Trump surrogates – including members of Congress – were stumping for Trump in Iowa and New Hampshire this week. But Stefanik’s presence in New Hampshire is...