Ethics?

I see in the news that a staffer for Republican Senate Lincoln Chaffee has been suspended without pay for using a Senate computer to send emails criticizing the senator's opponent. The news item notes that while not illegal, such use of a Senate computer violates ethical rules.

So what about the president devoting 8-10 days to running around the country campaigning for congressional candidates while being paid by taxpayers to run the country? What about the use of Air Force 1, numerous Secret Service personnel and presidential staffers? That is a vastly larger expense to the taxpayer than sending any number of campaign emails yet no one is suggesting it is unethical use of taxpayer money for partisan advantage. Perhaps we are not supposed to notice.