Trump's undoubted biggest accomplishment of 2018 was increasing the Republican majority within the U.S. Senate. The president undertook a grueling travel schedule during the 2018 midterm elections, at one point traveling to three different states per day and holding his signature rallies. Trump demonstrated his remaining ability to draw massive crowds of supporters who turned out to support his chosen candidates on election day.
Trump will now hold a 52-47 margin in the Senate, which will ease his ability to confirm judges to federal courts and gain approval for many of his nominees awaiting to fill cabinet vacancies. An increased margin in the Senate will also help temper any legislative efforts passed by the new Democratic majority in the House of Representatives.