I'm gonna tell youse da truth! All dese senators talkin' trash about blockin' Franken and Burris

[Gogi]

are just showboatin', they don't have the power! So stop chewin' on Reid and tell Cornyn to shut his piehole!

Burris was appointed by a governor who has not been pitched out of office (yet) so that makes it legal if not palatable and Franken's election, once certified, cannot be overturned. There's only a very narrow set of circumstances set forth in the Constitution that the Senate can use to keep Burris or Franken from taking their places in Congress. Neither man violates them.