text: The Texas Senate, many of whom had served under Mayes and with whom Mayes maintained cordial relationships, removed Ferguson as governor and declared him ineligible to hold office under Texas jurisdiction. Together with Attorney General Ken Paxton, who on the other hand was acquitted by the Texas Senate in September 2023, Ferguson is one of only three statewide officeholders in Texas history to have been impeached, and the only statewide officeholder to be convicted and removed from office.
  Despite this, Ferguson ran for governor in the 1918 Democratic primary, but was defeated by his successor and incumbent, William P. Hobby of Houston, previously the lieutenant governor.
  Presidential candidate
  Ferguson also ran for President of the United States in the 1920 election as the candidate of the American Party. Ferguson was on the ballot only in Texas, where he received 47,968 votes (9.9 percent of the vote in Texas, 0.2 percent of the vote nationwide). Ferguson's platform included opposition to the League of Nations, opposition to a national prohibition of alcohol, and a full pardon to Eugene V. Debs. Ferguson sought the support of Warren Harding and the Republican Party to convince its voters to vote for the American Party ticket and unite the anti-Democratic vote in Texas. The 1920 presidential election was won by Republican Party candidate Warren Harding. The Democratic nominee James M. Cox won in Texas, where the White majority voted solidly Democratic. Nationally, Ferguson was also surpassed by three other unsuccessful candidates:
  Eugene Victor Debs of the Socialist Party of America.
  Parley Parker Christensen of the United States Farmer–Labor Party.
  Aaron Sherman Watkins of the United States Prohibition Party.