BATON ROUGE — President Barack Obama is supported by slightly more than one-third of Louisiana voters and would be easily beaten in the state by Republican contenders Rick Perry or Mitt Romney, according to a new poll released Thursday.Obama's approval ratings in Louisiana are below his favorability ratings nationally. But Louisiana's backing of the tea party political movement also is strong. The Clarus poll shows 46 percent of voters surveyed support the tea party, while 30 percent opposed it. ……..When Republican voters were questioned about who they supported for the 2012 GOP presidential nomination, Perry, the Texas governor, was in...