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 ex-president’s comeback bid while auditioning to be his running mate. But far from the glare of the campaign trail, Burgum is wrestling at home with a mammoth carbon dioxide pipeline project. The $5.5 billion venture has split his state and left him straddling an awkward political divide. Burgum has stood out in the narrowing field of Trump’s potential V.P. choices due to his executive experience, business savvy, and close ties to deep-pocketed energy industry CEOs whose money Trump wants to help bankroll his 2024 campaign.