* Perry threatens Fed chairman, Bachmann also criticizes * Remarks reflect intense political pressure on Fed * White House says threatening Bernanke "not a good idea" (Adds fresh quotes from Bachmann, Obama, economist) WASHINGTON, Aug 16 (Reuters) - The White House denounced Republican presidential candidate Rick Perry on Tuesday for his threatening remarks toward the head of the U.S. Federal Reserve that represented some of the most inflammatory rhetoric of the 2012 election campaign. Campaigning in Iowa on Monday, the Texas governor said he would consider it "treasonous" if Fed Chairman Ben Bernanke "prints more money between now and the...