'They're going to do it!' Donald Trump warns he could be impeached AGAIN within months

"I'm going to be impeached. They're going to impeach me. They have no idea why," he told supporters.

Mr Trump is the only President to have been impeached twice, though neither attempt succeeded.

At least three Democratic lawmakers have already filed impeachment articles during his second term - though none have come to fruition.

The President told supporters they would "lose everything" should the Democrats seize control of Congress on November 3.

A Democrat victory would dismantle Mr Trump's key policy achievements, he warned.

"If we lose, you're going to lose your border, you're going to lose your tax cuts, you're going to lose everything that we've done," he said.

"We've got the biggest tax cuts in history. Think about no tax on tips, no tax on social security for our seniors, no tax on overtime. All of that's going to be gone.

"Your taxes are going to go up. Your pay is going to go down. Your jobs are going to be lost. They're going to end up closing up. Your businesses are going to flee."

The Democrats are split on whether to pursue impeachment, according to The Wall Street Journal.

Some fear a backlash from voters for going after Mr Trump a third time, while others say it would distract from actual policy goals like reducing prices.

Mr Trump has previously appeared unconcerned about the midterms - despite polls predicting Democrats will recapture the House of Representatives.

Some forecasters are also give them a narrow edge in the battle for the Senate.

A Democratic majority in either chamber would severely limit Mr Trump's ability to push through legislation during his remaining two years in office, stunting his power like Barack Obama's between 2014 and 2016.

Mr Trump was in South Carolina to campaign for Darline Graham, who was appointed to the Senate in July after the death of her brother Lindsey.

Unlike in the UK, if a senator dies or leaves office, a temporary replacement is usually appointed by the state's governor rather than a by-election.

She is seeking re-election in November - but must face a run-off vote on Tuesday having failed to win her primary outright.

Her candidacy has been dogged by a widely-criticised debate performance in which she conceded being "not that informed on national security" when asked about Taiwan.

Her race has been billed as a test of Mr Trump's control over his own party, especially after three candidates he endorsed lost their contests on Tuesday.

As a result, he issued one more plea to voters in South Carolina.

"What I really want you to do is pretend, please, that I'm on the ballot. Just come and vote," he said.