John Legere is the pitchman that T-Mobile US and Sprint need for their merger. Can he pull it off?  

The cheerleaderlike qualities that have helped the CEO bring enthusiasm to Bellevue-based T-Mobile are the same ones that induce groans. Testifying before the Senate judiciary subcommittee on antitrust last month, Legere wore his usual uniform: a superhero-esque magenta T-Mobile T-shirt under a black sports coat emblazoned with the company’s logo, his shoulder-length hair resting on the collar. Say what you will, but Legere’s shtick has worked, and even the groaners can’t argue with his track record at T-Mobile.