“Seinfeld” star Jason Alexander took note of Mitt Romney’s botched attempt to quote George Costanza, enough to trigger a momentary “Costanza 4 Prez” thread on Twitter.

“Thrilled Gov. Romney enjoys my old character. I enjoyed the character he used 2 b 2. If he’d embrace that again, he’d b a great candidate,” Alexander wrote.

At the start of the debate, as candidates were given time to introduce themselves, Romney cited Costanza and quipped, “When they’re applauding, you sit down.”

That’s a pretty liberal paraphrase for a line that actually was used by Jerry Seinfeld in response to George, as Buzzfeed noted.

Alexander has given extensively to Democratic party committees, and was a donor to Al Franken in his 2008 Senate bid. Larry David, co-creator of “Seinfeld” who has said that Costanza was loosely based on himself, is also a longtime donor to Democratic candidates.

This morning he was still poking fun as the injection of his character into presidential politics. “Costanza 4 Prez: finally a President who is master of his domain,” he wrote.

Judging by the reviews of last night’s debate, a curious mix of Beltway bluster and drawn-out talk about birth control, there may be a more apt “Seinfeld” reference to the faceoff: A show about nothing.