President-elect Donald Trump and Republican colleagues in Congress will begin trying on Wednesday to chart a path to enacting more tax cuts, border controls and fossil fuel production through a divided U.

Donald Trump is expected to meet Republican U.S. senators on Wednesday, a Republican aide said on Monday, as the president-elect urges his party to combine his priorities into one massive bill. The aide added that a time and location for the meeting were still to be determined.

President-elect Trump will be on Capitol Hill on Wednesday at the invitation of Senate Republican leadership, according to three sources familiar with the invitation. GOP leaders haven’t released the time of the meeting,

The House voted on Tuesday to pass a GOP-led bill to require detention of undocumented migrants charged with certain crimes, but the measure faces an uncertain future in the Senate in a sign of the challenges facing Republicans despite controlling both chambers of Congress.