US President Donald Trump is making himself “self-impeachable” by thwarting congressional subpoenas and obstructing lawmakers’ efforts to oversee his administration, House Speaker Nancy Pelosi has declared.

Ms Pelosi said, “every single day the President is making the case” and “goading” Democrats into proceeding with impeachment, because he believes it would help “solidify his base” of supporters.

Her remarks on Mr Trump’s alleged impeachment strategy comes after the President invoked “executive privilege” to block the release of Robert Mueller’s full un-redacted report on Russian interference in the 2016 presidential election.

“Every single day, he’s just like taunting, taunting, taunting”, Ms Pelosi, who has shown clear resistance toward supporting the drastic move, told the Washington Post.

Executive privilege is a legal right which allows presidents the ability to refuse congressional requests for information.

Ms Pelosi said Mr Trump is trying to provoke the Democrats to impeach him because “he knows that it would be very divisive in the country, but he doesn’t really care”.

Mr Trump’s move came just hours before the House Judiciary Committee voted  to hold Attorney General William Barr in contempt of Congress for refusing to comply with a subpoena for the un-redacted Mueller report and underlying evidence.

The contempt resolution will now move to the full House for consideration.

Former White House lawyer Don McGahn faces a similar threat.

The Judiciary Committee is one of a number of committees in the Democratic-controlled House that are investigating Mr Trump and his administration on multiple fronts, including White House security clearances, and Mr Trump’s personal and business dealings.

The House and Senate are still investigating Russian election meddling and possible obstruction of justice by Mr Trump.

Mr Mueller’s report cited extensive contacts between Mr Trump’s 2016 campaign and Moscow but did not find a conspiracy between Moscow and the campaign. It also described actions that Mr Trump took to try to impede the investigation and congressional Democrats have vowed to continue their own probe into the issue.

Mr Trump has denied any wrongdoing and vowed to fight all congressional subpoenas.

US Treasury Secretary Steven Mnuchin has also has defied Congress this week by not acting on the House Ways and Means Committee’s request for Mr Trump’s tax returns.

Republicans, who control the US Senate, have dismissed House Democrats’ investigations as political posturing ahead of the 2020 presidential election.

Democrats are divided over how far to take their investigations, with some calling for impeachment proceedings and others backing continued panel investigations.

-with AAP