Talking Points Memo writes, Pennsylvania Senate president Dominic Pileggi (R) has formally introduced a bill to award the state's electoral votes proportionally, a move that would effectively end its position as a swing state while likely aiding the next Republican presidential candidate. Republican lawmakers, egged on by the national Republican National Committee, have considered similar measures this year in blue states with GOP-controlled statehouses but in most cases the bills have been ruled out by top Republican officials. In Virginia, a bill to apportion electoral votes by congressional district was voted down…