Joshua Marshall, of Talking Points Memo, linked to this fascinating item. When you click on the "here" and then click on the "this page," as the blogger instructs, you'll see that the both Republican National Committee and the US Treasury site, which is taxpayer funded, have the same advertisement:

"America has a choice: It can continue to grow the economy and create new jobs as the President's policies are doing; or it can raise taxes on American families and small businesses, hurting economic recovery and future job creation."

I'm pretty sure the laws say something about how government publications and property can't be used for campaign purposes. It didn't stop the administration from filling the 2005 budget with 40-some glossy photos of the president impersonating a president (as the Economist noted about the budget they referred to as "an election year farce": "Think of it as a campaign brochure, complete with glossy pictures of the president bringing relief to the elderly, restoring the environment and exhorting the young."), but this seems far more blatant.