Iowa, has previously rejected President Donald Trump’s calls to disregard the federal official confirmation tradition. The senator’s spokesperson quoted him as telling

President Trump is escalating his criticism of Senate Judiciary Committee Chair Chuck Grassley (R-Iowa) for his unwillingness to overhaul the “blue slip,” a move that has further dismayed Senate Republicans.

The Judiciary Committee chair, and his fellow Republicans, have so far brushed off pressure from the president to nix the long-standing practice.