The hot topic for Star Tribune letter writers this weekend was Sixth District U.S. Rep. Michele Bachmann's appearance on MSNBC's "Hardball," during which she said of Barack Obama, "Absolutely, I'm concerned that he might have anti-American views." The newspaper received more than 150 letters on Bachmann's statement, only two of which took the congresswoman's side. John M. Huberty of Elk River asked, "I, for one, would like to know exactly how one qualifies as anti-American in her eyes." St. Louis Park Mayor Jeff Jacobs wrote, "Democracy depends on people who have the courage to stand up [and be critical]; for it is only from the crucible of disagreement among Americans that the best decisions are made." "The only thing that needs to be investigated is Ms. Bachmann's sanity," according to Mike Gibson of Seattle. And Norman Korn of Eden Prairie wrote, "The ghost of Joe McCarthy is back and representing the Sixth District of Minnesota. Have you no sense of decency, ma'am?" Among other letters we received: