WASHINGTON (Reuters) - U.S. Senator Elizabeth Warren of Massachusetts will endorse fellow Democrat Hillary Clinton for president on Thursday night, a Boston Globe reporter said on Twitter, citing a Warren source. Warren, who has a strong following in the progressive movement, will declare her support on MSNBC’s “The Rachel Maddow Show” on Thursday night at 9 p.m. EDT, reporter Annie Linskey said.  
Senator Warren to endorse Clinton Thursday night: Boston Globe reporter