This is not a political scandal. The implications of unchecked abuses of executive power extend way beyond the battle for Congress in 2014. There are real public-policy issues at hand, such as making sure that citizens who try to obtain health-care coverage through Obamacare are not subject to the same selective abuse by unelected paper-pushers.
If the IRS can target and discriminate against one group of Americans, it can arbitrarily do it to anyone. This is an attack on the civil liberties of all Americans, and Congress needs to act now to make sure it never happens again.