Between the GOP's thrashing at the polls, another one of President Trump's planned D.C. construction makeovers being halted and an uphill battle to overturn his conviction on 34 felony counts, this week has netted a string of setbacks for the president.Why it matters: Trump's administration is entering its lame-duck era, facing criticism and potential investigations as its power to reshape the federal government dwindles.But Trump is showing little inclination to change course.