FILE - This Nov. 2, 2006, file photo, former Massachusetts Republican Gov. William Weld endorses the candidacy of Lt. Gov. Kerry Healey, right, in her bid for the corner office against Democratic gubernatorial candidate Deval Patrick in Boston, Mass. Seizing new fuel for his appeal to Donald Trump's critics, former New Mexico Gov. Gary Johnson has joined forces with another former Republican governor to strengthen his Libertarian presidential bid. Weld, who served two terms as the Republican governor of Massachusetts in the 1990s, will announce plans Thursday to seek the Libertarian Party's vice presidential nomination, Johnson confirmed in a Wednesday interview with the Associated Press. (AP Photo/Stephan Savoia, File) **FILE**