(CNN) – Sen. Arlen Specter had a slight, early lead against Rep. Joe Sestak in Tuesday's Democratic Senate primary in Pennsylvania.
With 19 percent of precincts reporting, Specter had 52.1 percent of the vote. Sestak had 47.9 percent.
Specter, a five-term senator, is for the first time running for this seat as a Democrat. He left the Republican Party last year as his support in the GOP dropped after he voted for President Obama's stimulus plan.
Sestak is a retired Navy admiral who at one time trailed Specter 2-to-1 in pre-primary polls.