Matt Gaetz nominated for attorney general.
Gaetz faced a Justice Department investigation over sex trafficking allegations.
His nomination may encounter significant opposition in the Senate.
Gaetz resigned from Congress amid ongoing investigations.
Trump calls Gaetz a "gifted and tenacious attorney."
Lawmakers express shock and concern over Gaetz's suitability.
Gaetz aims to overhaul federal agencies like the FBI and ATF.
Trump's picks signal a strategy to surround himself with loyal supporters.
Gaetz would oversee critical investigations, including those involving Trump.
The nomination has sparked widespread media attention and public debate.