Kenneth Marcus’s potential return to the Education Department has drawn criticism from civil rights groups that see his narrow focus on Israel as blinding him to other matters of bias.
Mr. Killen, who died in prison, drew a 60-year sentence in 2005 after evading conviction 41 years earlier in the murders of three civil rights campaigners.
Border agents say the electronic searches have stopped terrorism suspects and criminals, but privacy advocates call them an invasive violation of the Constitution.
The crime was never prosecuted because two all-white grand juries refused to indict her attackers. Alabama lawmakers apologized in 2011.
In Jackson, Miss., the president hailed heroes of the civil rights movement even as activists and politicians said his presence insulted the effort to confront the state’s history.
Mr. Lewis and Bennie Thompson, both House Democrats, said they would not attend the museum opening because Mr. Trump is scheduled to be there.