|President Donald Trump. Photo: AP
The US president has repeatedly called Mueller's team "13 angry Democrats," although Mueller is a Republican. The latter was appointed by Trump's deputy attorney general, Rod Rosenstein.
The tweets came shortly after the Mueller team targeted former Trump campaign aide Paul Manafort's business dealings.
The former aide faces charges of money laundering and acting as an unregistered foreign agent. Manafort stated that Mueller should not be able to prosecute him because the charges do not stem directly from the purported Russian election interference.
Following the 2016 election, some US Senators, seeking to dismiss Trump, including Democratic Senator from California Maxine Waters, called to impeach the president for conflict of interest charges involving Trump family's global business contracts.Sputnik