See New York Times article about New York’s junior senator. I’ve been withholding judgment on Kirsten Gillibrand, because at the time she was first appointed to the Senate the word was she was more of a “centrist” than a liberal. But she represented a largely Republican district, I understand, so maybe she was just catering to her voters, and now that she’s in the Senate her inner liberal is coming out. We’ll see.
She is sometimes mentioned as a possibility for the presidential nomination in 2016. Seems unlikely, but who knows.