Trump ordered the Justice Department to investigate the threats made by Democrats against Republicans.
The US president accused the Democratic Party of political pressure, threats to impeach officials and criminal prosecution of Republican Party supporters.
According to Trump, the Democrats are threatening the Attorney General and other senior officials, and are also trying to intimidate Republican donors with threats of imprisonment.
Separately, the president accused Senator Alyssa Slotkin of intentionally persecuting young Americans for supporting Republicans.
"This is extortion at the highest level. These extortionists should go to jail! " - Trump said.
The president ordered the US Department of Justice to immediately begin an investigation into alleged illegal actions by the Democrats.