Don's statement after voting against the Senate version of the bailout makes the distinction quite clear:
"Today, I cast my vote against Senate version of the Emergency Economic Stabilization Act. This was decidedly one of the toughest votes I have taken during my career in elected office, but I am confident that I cast the right vote. It is my firm belief that giving Wall Street $700 billion in taxpayer money is not the right way to solve the fundamental challenges facing our economy and financial markets. I was hopeful that the new compromise bill would have a smaller pricetag with less taxpayer liability, but it did not."
I guess Cassidy believes in socialism for the wealthy, but not for the rest of us.