Senator Heidi Heitkamp’s latest attack ad targeting Congressman Kevin Cramer has to do with pension issues. In the ad, a truck driver named Al Thomas says Cramer “did practically nothing” to help fix distressed pensions for Teamsters and other workers. https://www.youtube.com/watch?v=XUPuZgoH-X8 Heitkamp’s campaign has been echoing these attacks to the media as well, but in…