Increasing numbers of Pennsylvanians who register to vote are identifying themselves as members of third parties, despite a closed primary system that permits only major party members to cast ballots in Pennsylvania's primary elections. Voters are asked to select a party affiliation when they register to vote. And an analysis of voter rolls in Westmoreland County shows that some people are choosing historic -- even eccentric -- political parties. Four county voters, for example, are registered as Whigs. The party last held serious sway in 1856, before it was absorbed into the newly organized Republican Party. "Obviously, the Whigs, it's...