It's nice to have Charles SchumerCharles (Chuck) Ellis SchumerJuan Williams: The politics of impeachment Texas Republicans slam White House over disaster relief request Dem rep: Trump disaster aid request is 'how you let America down again' MORE on your side.

Dan Senor became that latest politician to weigh a challenge to Sen. Kirsten GillibrandKirsten Elizabeth GillibrandDem: Ex-lawmaker tried to pin me to elevator door and kiss me In Washington and Hollywood, principle is sad matter of timing Mika Brzezinski: Bill Clinton needs to apologize or stop talking MORE (D-N.Y.), only to recoil when it came time to make a decision.

Senor, a former spokesman for the U.S.-led Coalition Provisional Authority in Iraq, said it wasn't the right time.

"Over the past few weeks, I took a very serious look at running for the Senate seat in New York," he said in a statement. "I ultimately decided this wasn’t the right time in my family and business life for me to run."

Senor had been talking to campaign advisers and building the infrastructure for a bid, and early this week the New York Daily News reported that he was primed to enter the race.

But Senor said he will instead support another GOP candidate.

“I was privileged to meet so many thoughtful, impressive, and energetic people as I explored this race, and I was very gratified by their enthusiasm," he said. "I will continue to look for ways to advance the policy debate here in New York, especially on issues that I am most concerned about: America's declining economic competitiveness, skyrocketing deficits and taxes, a national security strategy that is drifting and a morally equivalent foreign policy that is troubling."

Others who have dipped their toe in the water before opting not to run included Reps. Pete King (R-N.Y.), Carolyn McCarthyCarolyn McCarthyWhy Congress needs an openly atheist member, now Lobbying World Lobbying world MORE (D-N.Y.), Steve Israel (D-N.Y.), and Carolyn Maloney (D-N.Y.), as well as former Rep. Harold Ford Jr. (D-Tenn.), former New York Mayor Rudy Giuliani (R) and NYDN publisher Mort Zuckerman.