ORLANDO, Fla. – Florida Gov. Ron DeSantis is scheduled to hold a news conference Thursday in Orlando. A source tells ABC News that he is expected to announce his selection to replace U.S. Sen. Marco Rubio, who President-elect Donald Trump has nominated as U.S. Secretary of State.

The attorney general of Florida is supposed to represent the people of the state, not serve as counsel for the governor. Ashley Moody never understood that, but it’s worked out nicely for

Florida Gov. Ron DeSantis will appoint state Attorney General Ashley Moody to the seat Republican Sen. Marco Rubio is expected to vacate.

Moody, a former prosecutor and judge, has a record of “delivering results,” DeSantis said as he announced his choice at an Orlando hotel.

MIAMI - Florida House Speaker Danny "Daniel" Perez congratulated state Attorney General Ashley Moody on her appointment to the U.S. Senate by Florida Gov. Ro

Under Florida law, it’s up to the Republican governor to pick Rubio’s replacement after Trump picked the three-term senator to be his next secretary of state.

Moody, the state's attorney general, is Gov. Ron DeSantis’ pick to replace U.S. Sen. Marco Rubio, who is poised to be the next Secretary of State for President-elect Donald J. Trump. DeSantis made the announcement in a Thursday news conference in Orlando.