Sen. Kirsten Gillibrand wants to raise $120,000 before the Dec. 31 deadline set by the Federal Elections Commission, she wrote today in an email to supporters.

Gillibrand, who is running for a full six-year term in 2012, warns that she needs to flex her fundraising muscle now to show her likely opponents she means business.

“My potential opponents will be announcing their plans early next year,” Gillibrand wrote. “That means it’s critical that we show how strong we are and make these challengers think twice about entering the race.”

Gillibrand is considered a prodigious fund-raiser within the party and easily outspent her last Republican opponent, former Rep. Joe DioGuardi.

She faces potentially deep-pocketed Republicans next year in former hedge-fund manager Harry Wilson and businessman Marc Cenedella.

So far the only declared Republican candidate is Nassau County Comptroller George Maragos.

The full appeal from Gillibrand is after the jump.

I wish I didn’t have to bother you during the holidays, but I’m up against a critical deadline. My potential opponents will be announcing their plans early next year. That means it’s critical that we show how strong we are and make these challengers think twice about entering the race.

My campaign has set a goal of raising $120,000 before our December 31 FEC deadline. We must not fall short.

You’ve always played a key role in helping me win my campaigns. Can I count on a donation of $3 or more from you right now? The deadline is exactly 86 hours away, so we’ve really got no time to lose.

Click here to make your donation to my campaign right now, before midnight on December 31. This filing deadline is critical to showing my potential opponents that I’ll be unbeatable in 2012.

Ross, my finance director, tells me we’ve raised $62,783 so far, so we’re about half way there. I can’t miss this goal because my right-wing opponents will pounce if I show any sign of weakness.

We’ve got just three days. Three days before the stroke of midnight on New Year’s Eve. If we can make this goal, then we’ll be prepared for whatever comes our way during the busy election year ahead.

Just $62,783 to go. Will you help me get there?

Happy Holidays,

Kirsten