Washington, May 28 (TIWN) US President Donald Trump on Wednesday threatened Twitter with "big action" for tagging two of his tweets on mail-in voting with a fact-checking warning label.

"Twitter has now shown that everything we have been saying about them (and their other compatriots) is correct. Big action to follow!," Trump said in a tweet. The label was imposed on two tweets Trump posted on Tuesday, claiming that "mail-in ballots will be anything less than substantially fraudulent" and would result in "a rigged election".