Yes he did, the 2010 election. Arlen Specter. Santorum was devoted to Specter including his pro-abortion run for President in 1996
Arlen Specter announces for the White House, with endorsee, Rick Santorum at his side.
At Senator Arlen Specter’s official presidential campaign announcement in March 1995, then-Senator Rick Santorum showed his public support and encouragement of Specter by sitting directly next to him as Specter denounced the GOP’s war on abortion. It was at this event that Specter proclaimed his total opposition to social conservatism and declared he is in fact running to make the GOP pro-choice.
Santorum is seen nodding and applauding at Specter’s side:
3:46 mark: “In 1996, I intend to win the other house — the White House — with ten commitments to America… Especially a woman’s right to choose…
6:40 mark: “I pledge to lead the fight to strip the strident anti-choice language from the Republican National platform…”
17:05 mark: “neither this nation nor this party can afford a republican candidate so captive to the demands of the intolerant right...
I don’t care!!!! Told you that before. Santorum is a great conservative family man.