A majority of Republican senators have voiced concerns about the lack in diversity in the Trump administration’s administration of the White House.

In a new letter, Sen. Mike Lee, R-Utah, chairman of the Senate Republican Conference, and Rep. John Fleming, R,La., chairman of their respective committees on Health and Human Services, asked the White, Housing and Urban Development, Education and the Interior Departments to create a White House Diversity Task Force that would be charged with ensuring that the president’s cabinet nominees are diverse.

The task force will be chaired by White House Director of Diversity and Inclusion Catherine McCabe, according to the letter.

The letter, obtained by The Hill, was signed by all three members of the conference.

The letter comes a day after the WhiteHouse released the White Housing and Community Development portfolio, which included several cabinet positions with no women or minority applicants.

The WhiteHouse has been in the midst of an internal search to fill several cabinet-level positions, including Education Secretary Betsy DeVos, Housing Secretary Ben Carson, Transportation Secretary Elaine Chao and Health and Labor Secretary Alexander Acosta.

The Trump administration is currently in the process of filling at least seven additional cabinet positions.

The task force is expected to be a key focus of the search.

The committee has also been asked to look into the use of race in hiring decisions.

The current White House Office of Community Engagement has been under scrutiny for the past week after it received criticism from several groups for its treatment of the Black Lives Matter movement and other minority communities.