Republicans signaled this week that they might have given up hope in two important swing states. TPM Slideshow: Romney Takes The Stage At The RNC The Romney campaign and conservative groups like Crossroads GPS have pulled TV ads in Michigan, Romney’s home state, according to the Detroit News. Nor are the campaign and super PACs running advertising in Pennsylvania, after unleashing a barrage there over the past five months. It is still possible for groups to purchase TV advertising in either state at a later date. The PollTracker Averages show President Obama ahead 48.9 percent to 45.4 percent in Michigan,...