President Donald Trump has sparked fresh controversy by sharing a series of posts questioning the results of the midterm elections, including Democrat James Talarico's stunning victory in Texas – just days after promising to accept the outcome.

The president spent part of Saturday amplifying claims about 'unusual' voting patterns, dramatic increases in Democratic support and election-night figures that some conservative commentators suggested were difficult to believe.

Trump shared several charts and messages on Truth Social that appeared to cast doubt on the scale of the Democrats' sweeping victories, which saw Republicans lose control of both chambers of Congress.

But none of the material he circulated provided evidence of election fraud or wrongdoing.

The posts mark a striking change in tone from Tuesday night, when Trump told The New York Times he was 'absolutely willing' to accept the election results and work with the incoming Democratic majorities.

One of the most provocative messages concerned Talarico's crushing victory over Trump-backed Republican Ken Paxton in the Texas Senate race.

The president reposted a message from an account called The Lone Raccoon, which featured a graph showing the candidates' vote totals rising throughout election night, including several sharp jumps.

The graph highlighted sudden increases in the Democratic candidate's tally, although such jumps can occur when election officials release large batches of counted ballots.

Talarico's victory was one of the biggest shocks of Tuesday's elections, making him the first Democrat elected to the Senate from Texas since 1988.

The 37-year-old former teacher defeated Paxton by approximately 12 percentage points in a state that Trump carried comfortably just two years earlier.

Paxton has already conceded the race and congratulated his Democratic opponent.

Trump also circulated another message highlighting what its author claimed was an extraordinary surge in Democratic votes nationwide.

The post, originally published by Kevin Bass, declared: 'Republican votes stayed the same. Democrats materialized 20 million new votes.'

An accompanying bar chart compared the popular vote in House elections in 2022 and 2026.