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ExxonMobil CEO Rex Tillerson delivers remarks on the release of a report by the National Petroleum Council on oil drilling in the Former New York Mayor Rudy Giuliani walks around the convention floor before the evening session of the Republican National Conven Sen. Joe Manchin, D-W.V., a Democratic sponsor of the long-stalled Keystone XL pipeline bill, flanked by Sen. Al Franken, D-Minn., Former U.S. Ambassador to the United Nations John Bolton speaks at the opening night dinner of the California Republican Conventio Senate Foreign Relations Committee Chairman Sen. Bob Corker, R-Tenn., talks on Capitol Hill in Washington, Tuesday, June 28, 2016, Scott Sommerdorf | The Salt Lake Tribune Jon M. Huntsman, Jr. jokes with students as he helped deliver teaching materials to Me Al Hartmann | Tribune file photo Mitt Romney is shown in late 2016. Former CIA Director and retired Gen. David Petraeus is interviewed by host Anthony Scaramucci and Maria Bartiromo during the tapin Republican presidential candidate, former Massachusetts Gov. Mitt Romney, left, greets fellow candidate, former Utah Gov. Jon Hunt President-elect Donald Trump gives his acceptance speech during his election night rally, Wednesday, Nov. 9, 2016, in New York. (A AP file photo Former Utah Gov. Jon Huntsman gestures during a New Hampshire primary night party in Manchester, N.H., Tuesday Jan. AP file photo In this photo taken Dec. 1, 2014. for Republican presidential canadiate Mitt Romney smiles on the field before an NF Republican presidential candidate, former Massachusetts Gov. Mitt Romney, left, greets fellow candidate, former Utah Gov. Jon Hunt