President-elect Donald Trump’s nominee to head the Department of Housing and Urban Development declined Thursday to wade into the turbulent political waters of how the incoming administration’s tariffs could affect housing costs.

As Scott Turner readies for his Senate confirmation hearing, Sen. Elizabeth Warren is vowing to press him on a series of housing issues.

Senate hearings are scheduled this week for several of Trump’s picks for the Cabinet. While many are rapidly gaining support for their confirmation, the remaining still have to go before the committees overseeing the agencies Trump wants them to run.