NEWTON, Iowa — Democratic presidential contender Barack Obama on Monday said his campaign made a "dumb mistake" when it circulated a memo criticizing rival Hillary Rodham Clinton's financial ties to India. In an interview with The Associated Press, Obama disavowed the memo which carried the headline — "Hillary Clinton (D-Punjab) — and referred to Bill and Hillary Clintons' investments in India; her fundraising among Indian-Americans; and the former president's $300,000 in speech fees from Cisco, a company that has moved U.S. jobs to India. "It was a dumb mistake on our campaign's part and I made it clear to my...