Former Rhode Island Governor Chafee mulls White House run

(Reuters) - Former Rhode Island Governor Lincoln Chafee said on Thursday he was mulling a run for the White House, becoming the first Democrat to publicly challenge presumed front-runner and former Secretary of State Hillary Clinton. Chafee served eight years in the U.S. Senate as a Republican, then changed his party affiliation to independent when he ran for governor of Rhode Island in 2010. In 2013, his last year in office, he changed his party affiliation to Democrat.