evidence: BISMARCK, N.D. (AP) — North Dakota Gov. Doug Burgum is one of Donald Trump’s most visible and vocal backers, sprinting around the country to drum up support for the former president’s comeback bid while auditioning to be his running mate. [...] A Republican little known outside North Dakota, Burgum is a serious contender to be Trump’s vice-presidential choice. The two-term governor has stood out in the narrowing field of choices due to his executive experience and business savvy. And Burgum has close ties to deep-pocketed energy industry CEOs whose money Trump wants to help bankroll his third run for the White House.