Re: 如果没记错，

总统 + 两院 + 最高法院，都归于一尊，是美国有史的这248年以来，唯一的一次大选结果。

还是有过先例的：

• Between 2001 and 2007, Republicans controlled at certain points all three branches while President George W. Bush occupied the White House. GOP control was interrupted between 2001 and 2003, as the Senate majority flipped to the Democrats as one senator switched his party affiliation, one senator died, and when the 2002 midterm elections shifted control of the upper chamber.

• From 1961-1969, Democrats controlled all three branches during the administrations of Presidents John F. Kennedy and Lyndon B. Johnson.

• The 83rd Congress (1953-1955), during the presidency of Republican Dwight D. Eisenhower, saw the deaths of nine senators and the resignation of one. These changes shifted the balance of power in the Senate with each new replacement, according to the U.S. Senate website. When Republicans held the Senate majority during those years, all branches of government were under Republican-control, as the party also held the White House and Supreme Court.

• From 1937-1945, Democrats controlled all three branches of government during the administrations of Presidents Franklin D. Roosevelt and Harry S. Truman.

• And from 1927-1933, Republicans controlled all three branches of the government when Presidents Calvin Coolidge and Herbert Hoover occupied the White House.

出处： https://www.azcentral.com/story/news/politics/fact-check/2016/12/01/fact-check-one-party-three-branches-federal-government/94636286/