Secret Service probing claimed theft of Romney tax records, $1M hush money demand ....

An anonymous letter sent to Romney's accounting firm and political offices in Tennessee and published online sought $1 million in hard-to-trace Internet currency to prevent the disclosure of his tax filings, which have emerged as a key focus during the 2012 presidential race. Romney released his 2010 tax returns and a 2011 estimate in January, but he has refused to disclose his returns from earlier years.