President Donald Trump is swept up in an impeachment inquiry that seriously threatens his presidency — and an unfounded conspiracy theory that reached the Oval Office is largely responsible for it.

During a July 25 phone call with Ukrainian President Volodymyr Zelensky, Trump pressured him to launch an investigation into former vice president Joe Biden and his son, Hunter Biden, over unsubstantiated allegations of corruption.

Then reports of the call — and the disclosure of a whistleblower complaint filed against the president — spurred Democrats to initiate impeachment proceedings against Trump that could lead to his removal from office.

But this certainly was not the first debunked or unverified conspiracy theory Trump has floated and encouraged during his time in the political spotlight.

Here are 24 of the most notable conspiracy theories Trump has entertained over the years.

President Donald Trump is swept up in an impeachment inquiry that seriously threatens his presidency — and an unfounded conspiracy theory that reached the Oval Office is largely responsible for it.

During a July 25 phone call with Ukrainian President Volodymyr Zelensky, Trump pressured him to launch an investigation into former vice president Joe Biden and his son, Hunter Biden, over unsubstantiated allegations of corruption. Then reports of the call — and the disclosure of a whistleblower complaint filed against the president — spurred Democrats to initiate impeachment proceedings against Trump that could lead to his removal from office.

But that certainly was not the first debunked or unverified conspiracy theory Trump has floated and encouraged during his time in the political spotlight.

Throughout his presidency, on the campaign trail, and even in the years prior, Trump has floated theories fueled by the conspiratorial-minded corners of supermarket tabloids and the darkest corners of the internet.

Here are 24 of the most notable conspiracy theories Trump has entertained over the years.