An interesting point from a TPM reader:

Contrast that to the (admittedly luried) [sic] tale of Norman Hsu, fronted by papers around the nation. That was a case of a major donor to Democratic figures who turned out (unbeknownst to the politicians to whom he donated) to be a crook and a fraud. That's big news. But when a businessman who is a major donor to Republican politicians turns out to be a crook and a fraud, and some of the nation's senior legislators are revealed to have knowingly accepted his bribes and funneled him earmarks in return, it's hardly worth mentioning.

Emphasis mine.