Chairman and CEO Harold Hamm told the Republican National Convention thatpresumed Democratic presidential nominee Hillary Clinton will "eliminatefossil fuel development" if elected while GOP rival Donald Trump would"fuel America's future."

Hamm,who Reuters and Politico say Trump is considering for energy secretary if hewins the White House, spoke July 20 at the GOP convention in Cleveland. In hisroughly five-minute prime-time speech, Hamm praised Trump's plans for energy,which include repealing Obama administration climate and water rulesin an effort to achieve total U.S. energy independence.

"PresidentTrump will release America's pent-up energy potential, get rid of foreign oil,trash punitive regulations, create millions of jobs and develop our moststrategic geopolitical weapon — crude oil," Hamm said.

Theoil and gas company CEO blasted Clinton, claiming that she would build on the"punitive regulations" introduced by President Barack Obama for theenergy sector.

"HillaryClinton would eliminate fossil fuel development in America," Hamm said."She would kill jobs, drive up gasoline prices and increase oil importsfrom our enemies."

Nationalsecurity was another big theme in Hamm's speech. He made a direct link betweendomestic oil production and national security, which he said would becompromised by regulations that stand in the way of new supply and force theU.S. to rely on imports.

"Climatechange isn't our biggest problem. It's Islamic terrorism," he said."Every onerous regulation [on producers] puts American lives at risk.Developing America's own oil supply is a matter of national security."

Hammeducated Trump on the surge in Bakken Shale oil and gas production and, alongwith U.S. Rep. KevinCramer of North Dakota, helped craft the GOP nominee's first majorenergy policy address. Trump campaign spokesperson Hope Hicks did not respondto a request to confirm whether Hamm was being considered as a Trump Cabinetmember.

Thepotential for Hamm to become energy secretary drew jeers from Clintonsupporters and proponents of federal climate regulations for the electric powersector and stricter oversight and federal regulation of oil and gas wells.

"AppointingBig Oil tycoon Harold Hamm to be energy secretary is like asking the fox toguard the henhouse," Sierra Club Political Director Khalid Pitts said."A vote for Donald Trump isn't just a vote for the only climate denierhead of state on earth, it's also a vote for contaminated water across thecountry delivered by a 'Fracker in Chief.'"

Hammhelped drive the development of hydraulic fracturing in the Bakken Shale. In addition to heading Continental Resources, Hammco-founded and chairs the Domestic Energy Producers Alliance, which representsU.S. onshore producers. As part of his work with the alliance, Hamm led thecharge to end the40-year ban on U.S. crude exports in December 2015.

AlthoughClinton has called for tougher regulations on fracking, she and the DemocraticParty have stoppedshort of seeking a nationwide ban on the practice. Fossil fuelproducers, particularly in the coal industry, are still leery of Clinton'senergy goals. She has pledged support for the U.S. EPA's Clean Power Plan tocut electric-power-sector carbon emissions, a rule Trump has said he wouldthrow out, and opposes the proposed Keystone XL crude pipeline, which Trump hassaid he would approve if TransCanada renews its permit application for theproject.