NEW YORK: Donald Trump became the first US president to be convicted of a crime on Thursday when a New York jury found him guilty of falsifying documents to cover up a payment to silence a porn star ahead of the 2016 election.

After deliberations over two days, the 12-member jury annou­nced it had found Trump guilty on all 34 counts he faced. Unanimity was required for any verdict.

Trump watched the jurors dispassionately as they were polled to confirm the guilty verdict.

The verdict plunges the United States into unexplored territory ahead of the Nov. 5 presidential election, when Trump, the Republican candidate, will try to win the White House back from Democratic President Joe Biden.

Trump, 77, has denied wrongdoing and is expected to appeal. He faces a maximum sentence of four years in prison, though others convicted of that crime often receive shorter sentences, fines or probation. Incarceration would not prevent him from campaigning, or taking office if he were to win.

Opinion polls show Trump and Biden, 81, locked in a tight race, and Reuters/Ipsos polling has found that a guilty verdict could cost Trump some support from independent and Republican voters.

The jury found Trump guilty of falsifying business documents after sitting through a five-week trial that featured explicit testimony from porn star Stormy Daniels about a sexual encounter she says she had with Trump in 2006 while he was married to his current wife Melania. Trump denies ever having sex with Daniels.