President-elect Donald Trump announced Friday that he plans to nominate Sen. Jeff Sessions (R-Ala.) as attorney general and Rep. Mike Pompeo (R-Kan.) as CIA director, the first selections to his Cabinet as his transition continues to build momentum.

Trump also confirmed that he has selected retired general Mike Flynn as his national security adviser, news that had been reported a day earlier.

In a statement, Trump called Sessions one of his most trusted campaign advisers and cited his “world-class legal mind.”

Sessions, 69, was Trump’s first endorser in the Senate and quickly became the then-candidate’s chief resource on policy, but his hard-line views on immigration are expected to make his nomination controversial among human rights groups and Democrats.