President-elect Donald Trump has nominated Florida congressman Matt Gaetz as attorney general, acting as the nation's top law enforcement officer.The move sparked controversy among Republican lawmakers."I don't know. I'll have to think about that one," Sen. Lindsey Graham, R-South Carolina, said when asked about any concerns on Trump's nomination of Gaetz.Others appeared open to appointing Gaetz to the position."I completely trust President Trump's decision-making on this one," Sen. Markwayne Mullin, R-Oklahoma, said in a Wednesday interview. "But at the same time, he's got to come to Congress and sell himself."In a social media post, Trump praised Gaetz, calling him "a deeply gifted and tenacious attorney" and "a champion for the Constitution and the rule of law."Senate Republicans remain aware of Trump's emphasis on loyalty to earn his favor. Incoming Senate Majority Leader John Thune, R-South Dakota, suggested quick action confirming Trump's nominees."We will do everything we can to process his nominations quickly, get them installed in their position so they can begin to implement his agenda," Thune said. "We expect a level of cooperation from the Democrats to work with us to get these folks installed."Trump has also nominated former Hawaii Rep. Tulsi Gabbard for Director of National Intelligence and Florida Sen. Marco Rubio for Secretary of State.Some Republicans appeared eager to confirm Trump's nominees, including Gaetz, to implement the president-elect's agenda."He's not going to work for us. He's going to work for President Trump. He's going to work for the country," Sen. Tommy Tuberville, R-Alabama, said. "Let's get on the boat and confirm him and let him get to work."Gaetz resigned from Congress shortly after the announcement of his nomination, effectively ending a House Ethics Committee investigation on allegations of child sex trafficking.A similar investigation by the Justice Department did not result in charges against Gaetz.Trump has suggested that he would use the Justice Department to go after his political enemies, following his own experiences of being twice impeached and charged by the DOJ and elsewhere.Gaetz, a staunch Trump defender, has echoed Trump's sentiments, demanding a "full court press" to investigate a so-called "weaponized" government, including the potential of abolishing agencies like the FBI and the Bureau of Alcohol, Tobacco, Firearms and Explosives.Trump also announced several White House senior staff members on Wednesday, including Dan Scavino, who helps Trump draft his social media posts, and Stephen Miller, the architect behind Trump's immigration policies. Those positions do not require Senate confirmation.