A national group that registered tens of thousands of new voters in Colorado is under fire in several states for using fake names to sign up voters. The Association of Community Organizations for Reform Now (ACORN) has been charged with dropping off at least 10,000 invalid voter applications in a dozen states, according to news reports. But ACORN officials say that GOP operatives — and John McCain in specific — are fanning nonexistent flames. And while the group's Colorado operations are in the clear, it was mischaracterized as "under investigation today" by Republican Rep. Marilyn Musgrave during a debate last week with Democratic challenger Betsy Markey.