Constitutional amendment for a non-presidential government

 The problem is not Trump. The problem is having a president in the first place. Here is the government I have in mind:

The House of Representatives would be increased to 500 members and these would be allocated by state based on population. The Speaker of the House would be elected by a majority of the House and would be the effective head of government and commander-in- chief of the military. He would choose other members of the House as his cabinet. All bills would start in the House.

The Senate would stay at 100 members or two per state if new states were ever voted in. The Senate could hold hearings on House bills and propose amendments. When a House bill was passed, the Senate would have 30 days to veto a bill by 2/3 majority. The House could then override the veto by a 2/3 majority of the House. The President of the Senate elected by a majority of the members would appoint federal judges and the Senate would approve them. The current presidential duties of meeting and entertaining foreign dignitaries would go to Senators on a rotating monthly basis.

Also, just to throw it out there, in order that D.C. residents could have representation in Congress, I propose:

The city of Washington be absorbed back into Maryland. The federal government would retain control of federal buildings and certain land on the National Mall between the Capitol building and the White House.