Sen. John McCain (R-Ariz.) has tapped a former Reagan administration official to head his campaign’s search for a vice presidential nominee. Senate Republican Conference Chairman Lamar Alexander (Tenn.) told The Hill that Arthur Culvahouse, who was Reagan’s White House counsel from March 1987 to January 1989, will be helping McCain vet candidates and develop a list. Alexander and Culvahouse have known each other for decades and both have connections to former Senate Majority Leader Howard Baker (R-Tenn.). “It’s Arthur B. Culvahouse, that’s who’s heading the search,” Alexander said. Culvahouse refused to comment to The Hill, as did the McCain campaign....