Newt Gingrich is trying to position himself as the challenger to Mitt Romney — or as he said in an email to supporters today, “the last conservative standing.” But that may be difficult, given the former House speaker’s anemic fundraising and non-existent campaign organization. Case in point: A $500 check Gingrich wrote bounced.Although it isn't terribly funny to the businesses that Gingrich screwed over (and he wasn't even married to them).