Barr chutzpah

Bob Barr, who for some reason is still running for president, has a complaint:

Palin didn't explain what the Republican ticket would do differently from the current Republican administration and past Republican Congresses. For example, the words Social Security, Medicare, national debt, the deficit and the Constitution didn't pass her lips. Yet Social Security and Medicare alone face an unfunded liability of more than $100 trillion. The national debt runs $9.5 trillion. The deficit next year will be a half trillion dollars.

Who was it again who voted to add prescription drug coverage to Medicare?