The AFL-CIO, the nation’s largest labor federation, attacked President Trump’s nominees to fill the remaining open seats on the National Labor Relations Board on the eve of their first Senate hearing. The federation said the nominees’ records “raise serious concerns” and appeared “to be in direct conflict” with the agency’s mission.

The nominees, lawyers Marvin Kaplan and William Emanuel, would give the five-member board, the main federal labor law enforcement agency, a 3-2 Republican majority for the first time since President George W. Bush’s administration. Kaplan is chief counsel of the Occupational Safety and Health Review Commission, a federal agency. Emanuel is a shareholder with Littler Mendelson, a management-side law firm that specializes in labor matters, often before the labor board. The nominees are scheduled to appear Thursday before the Senate Health, Education, Labor and Pensions Committee.