WLVT PBS 39 presents its Lehigh Valley Tempo! segment on James Buchanan. Lehigh Valley Tempo! is a weekly news magazine broadcast program for WLVT. James Buchanan is the only Pennsylvanian to ever be elected President. Buchanan, unfortunately, is also considered one of the worst Presidents by many historians. Buchanan was replaced by Abraham Lincoln just before the outbreak of the Civil War.