Commentary: After Donald Trump, placing limits on presidency powers an urgent priority Toggle share menu Advertisement Commentary: After Donald Trump, placing limits on presidency powers an urgent priority Donald Trump’s presidency tested US institutions. And as the US turns a page, it’s timely to reinforce institutions and put limits on the powers of the US president, says Daron Acemoglu. Then President Donald Trump and first lady Melania Trump board Air Force One at Andrews Air Force Base on Wednesday, Jan 20, 2021.(Photo: AP/Manuel Balce Ceneta) 24 Jan 2021 06:10AM) Share this content Bookmark BOSTON, Massachusetts: The storming of the US Capitol by Donald Trump’s supporters on Jan 6 may be remembered as a turning point in American history.