US President Donald Trump early Wednesday said he expected a "big win" and accused Democrats of trying to "steal" the election after rival Joe Biden predicted victory.
"We are up BIG, but they are trying to STEAL the Election," Trump wrote on Twitter moments after Biden told supporters he expected to win.
Within minutes, Twitter flagged the tweet, saying "some or all of the content shared in this Tweet is disputed and might be misleading about an election or other civic process."
"We will never let them do it. Votes cannot be cast after the Poles [sic] are closed," added Trump, who promised to speak more later.
The president has long charged, with no evidence, that mail-in ballots are a way to cheat in the election.
Mail-in ballots, sent due to health concerns during the Covid-19 health crisis, are expected to favour Biden and in some states were being counted later.
Trump appeared to be responding to Biden, who moments earlier told his supporters to be patient.
"We believe we are on track to win this election," Biden said to honks of approval in his home state of Delaware.
"It ain't over till every vote is counted," he said.
"It's not my place or Donald Trump's place to say who won this election," he concluded.
Biden said he was confident at winning Arizona, Michigan, Pennsylvania and Wisconsin – all states carried by Trump in 2016.
Moments after Trump's tweet, US media called Texas for the US president, another crucial victory in his hopes to retain the White House.