Why is Lieberman campaigning for John McCain on his Senate Web site?

That's against the Senate rules. It's one thing for Joe Lieberman to sell out Harry Reid and the Democratic party and endorse the Republican for president, but it's quite another to permit him to use government resources to campaign. I'm pretty sure that's not allowed, and it's clearly the intent of Lieberman's newest veiled post to his Web site. He's taking a swipe at Democratic nominee Obama in an effort to help Republican nominee McCain.