In 2017, Donald Trump failed to pass a new health care bill to replace the Obama administration's Affordable Care Act. That bill died on the Senate floor, even with a Republican majority in the United States Senate, House Of Representatives, and with a Republican President. Furthermore, since his election, Trump has not been able to make good on his flagship campaign promise of building a wall along the United States border of Mexico.
With Democrats taking control of the House in the 2018 midterm elections, Trump's troubles just got a lot worse.
According to a report from Vox, Donald Trump's presidency now faces a whole new mountain of problems as Democrats now have the power to vote down GOP legislature before it has a chance to reach the Senate This means, if the President wants any of his policies to pass, he'll have to work towards making bipartisan resolutions to America's most dividing issues. Any hardline Republican bills will likely be squashed before they even pick up much steam. In fact, with the Democratic Party leaders deciding what even makes it to the floor of the House in the first place, the GOP legislative agenda is essentially off the table until at least 2020.