WASHINGTON (JTA) -- Several Jewish Democratic incumbents are fighting for their political survival as Americans head to the polls.

Lawmakers under threat Tuesday in a midterm election cycle that has seen a conservative/Republican resurgence include U.S. Sen. Russ Feingold (D-Wis.) and Reps. Ron Klein (D-Fla.), Gabrielle Giffords (D-Ariz), Alan Grayson (D-Fla.), John Adler (D-N.J.) and Steve Kagen (D-Wis.).

Rep. Paul Hodes (D-N.H.) appears set to lose his bid to win New Hampshire's open U.S. Senate seat, as does Ohio Lt. Gov. Lee Fisher , a Democrat.

Sen. Barbara Boxer (D-Calif.) looks like she has beaten back a challenge from Carly Fiorina, the former CEO of Hewlett Packard.

The results may open up new leadership opportunities in both houses.

Rep. Eric Cantor (R-Va.), the minority whip in the U.S. House of Representatives, is poised to become majority leader should Republicans retake the House, as is anticipated.

If Majority Leader Harry Reid (D-Nev.) loses a hotly contested battle to conservative Tea Party-backed Republican Sharron Angle, Sen. Charles Schumer (D-N.Y.) is likely to run for party leader in the Senate, where Democrats are expected to maintain their majority.