The political arm of the liberal group MoveOn.org is backing Rep. Joe Sestak and Jack Conway ahead of Tuesday’s Democratic primaries in Pennsylvania and Kentucky, respectively.

Sestak, a two-term Congressman who is neck-and-neck in the polls with party-switching Sen. Arlen Specter, got 67 percent of the votes of the group’s Pennsylvania members, according to a release Friday.

Conway, Kentucky’s attorney general, was backed by 62 percent of his state’s MoveOn.org members as he battles Lt. Gov. Daniel Mongiardo for the party nod.

The endorsements mean that “MoveOn will help generate volunteers and do [get-out-the-vote] work in advance of Tuesday’s vote,” the group said.

Former Rep. Pat Toomey (R) awaits the winner of the Specter-Sestak slugfest. And it’s looking like eye surgeon Rand Paul will be the Republican nominee in Kentucky.