Former Sen. Larry Pressler (R-S.D.), who was the first Vietnam veteran to serve in the United States Senate, is the latest Republican to back Sen. Barack Obama's presidential campaign, Politico learned Sunday. Pressler, who said that in addition to casting an absentee ballot for Obama he'd donated $500 to the Illinois senator's campaign, cited the Democrat's response to the financial crisis as the primary reason for his decision. "I just got the feeling that Obama will be able to handle this financial crisis better, and I like his financial team of [former Treasury Secretary Robert] Rubin and [former Federal Reserve...