I don't agree.
After the swiftboating of Kerry and all the crazy accusations against Obama, Republicans have nothing to complain about when it comes to campaign tactics. Reid's playing dirty pool, and to that I say, it's about time.
No, Romney is not required by law to release any of his tax returns at all. But the fact that he not only has not released more than one single year's info, but refuses to even discuss the matter, sends a clear signal to voters that he has something to hide, and voters have a good idea what it is.
"Everything the Communists said about Communism was a lie, but everything they said about capitalism turned out to be the truth." -- Russian and eastern Europe proverb