Can Libertarian nominees Gary Johnson and Bill Weld siphon votes from Trump?

Former New Mexico Gov. Gary Johnson seized the Libertarian nomination for president at the party’s national convention this weekend and escaped a hotly contested convention with his hand-picked running mate, former Massachusetts Gov. William Weld.
The pair form a political team of two former Republican governors that Johnson declared to be the most formidable third-party ticket in the modern era, one that he promised would thrust Libertarians from the fringe of American politics to “major party status” in a period of widespread mistrust of both the Republican and Democratic...