'Super PACs' and nonprofits have no official role in the Republican National Convention, but they're meeting with donors and fellow operatives in private and public in Tampa, Fla.TAMPA, Fla. — A little more than a year ago, Frank VanderSloot contributed $1million to a "super PAC" supporting Mitt Romney. Now, the Idaho-based health products executive is a sought-after donor at the Republican National Convention as he makes the rounds of independent groups backing the GOP ticket.