Any way you slice it, $287, 273 is a lot of money, especially in this economy. For one-term Senator Claire McCaskill, D-Mo., up for re-election in 2012, that's the amount of personal property taxes she failed to pay since 2007 on a plane she and her husband, a millionaire businessman, partially owned. "I have discovered that the...personal property taxes on the plane have not been paid," McCaskill told a small number of reporters on a conference call Monday. "There should have been a reporting to the county of the existence of this airplane...There are people I could blame for this,...