Per the 2008 Pennsylvania Republican presidential primary Official results, there were three candidates:  John McCain who received 594,061 votes or 72.86% of the vote, Ron Paul who received 129,246 votes or 15.85% of the vote and Mike Huckabee who received 92,057 or 11.29% of the voter.
John McCain 594,061 72.86% Ron Paul 129,246 15.85% Mike Huckabee* 92,057 11.29% 
