WASHINGTON — Despite the Republican strategy of passing piecemeal immigration reform, Sen. John McCain predicted today that comprehensive legislation can pass the GOP-controlled House. “I think this fall is very important,” McCain said at a forum hosted by AFL-CIO and the Economic Policy Institute. “Let’s say we enact it, comprehensive immigration reform — I don’t think it gains a single Hispanic voter, but what it does, it puts us on a playing field where we can compete for the Hispanic voter,” McCain told PBS’ Gwen Ifill. “If we don’t do that, frankly, I don’t see — I see further polarization...