Thanks to moderate Dems, our 60-seat Senate majority only moves the chamber slightly to the left. From Stew Rothenberg:

I was interviewing a reliably liberal Democratic candidate running in 2010 in a swing state. I asked him what he will say when his formidable Republican opponent argues that the country doesn’t need yet more Democrats in Washington, D.C. — that it needs more officeholders who will act as a check on President Barack Obama and the Democratic-controlled Congress

“I’ll say that if you look at what has been happening in Congress right now, we appear to have plenty of Democrats who are acting as checks on Democrats in Washington,” he answered with a smile.