#Trump100Days The first 100 days of Donald Trump as President of the United States were marked by bold promises, swift executive actions, and deep political disagreements. Taking office on January 20, 2017, Trump quickly began implementing parts of his 'America First' agenda. He signed a wave of executive orders, including efforts to roll back Obama-era regulations, limiting immigration from several predominantly Muslim countries, and initiating plans to build a wall along the Mexico border.