House Speaker Nancy Pelosi effectively killed Democrats' proposal to expand the Supreme Court by four seats House Judiciary Chairman Jerry Nadler will announce details of the bill Thursday Pelosi said: 'I support the president's commission to study such a proposal' Senate Judiciary Chairman Dick Durbin also said Thursday he's not ready to back the proposal The Supreme Court now leans conservative, with Trump appointing three Republicans warned during the election that Democrats would try and change it Biden in 2005 said packing the court with more liberal judges was 'power grab'