Just days after Donald Trump criticised congressional Democrats for “ridiculous partisan investigations”, the president is facing a renewed Russia inquiry from Congress that has left him complaining about presidential harassment.

Mr Trump said as much in response to the announcement that Democrats in the House Intelligence Committee have re-opened their probe into Russian meddling in the 2016 election, marking yet another official investigation into the issue that has dogged the White House for more than two years.

“So now Congressman Adam Schiff announces, after having found zero Russian Collusion, that he is going to be looking at every aspect of my life, both financial and personal, even though there is no reason to be doing so,” Mr Trump tweeted on Thursday morning.

He continued: “Never happened before! Unlimited Presidential Harassment … The Dems and their committees are going ‘nuts.’ The Republicans never did this to President Obama, there would be no time left to run government. I hear other committee heads will do the same thing. Even stealing people who work at White House! A continuation of Witch Hunt!”

Democrats have indicated they plan on using their newly acquired congressional subpoena power to delve into Mr Trump’s political and personal world in a way that Republicans who previously controlled the committee before losing control of the chamber in the 2018 midterms shied away from.

President Trump delivers State of the Union address Show all 22 1 /22 President Trump delivers State of the Union address President Trump delivers State of the Union address Nancy Pelosi’s ‘sarcastic’ clapping stole Trump’s thunder For many the president's speech was overshadowed by Democratic House Speaker Nancy Pelosi's applause after his call for political unity, which many interpreted as "sarcastic" AFP/Getty President Trump delivers State of the Union address Trump issues ominous threat over investigations as he rails against immigration and abortion In a State of the Union speech calling on Washington to cast aside “revenge, resistance and retribution”, Donald Trump was accused of issuing a veiled threat over the investigations dogging his administration. “An economic miracle is taking place in the United States — and the only thing that can stop it are foolish wars, politics or ridiculous partisan investigations,” Mr Trump said AFP/Getty President Trump delivers State of the Union address Congresswomen, dressed in white in tribute to the women's suffrage movement, pose for a photo as they arrive AFP/Getty Images President Trump delivers State of the Union address The 72-year-old harkened back to American achievements, celebrating the moon landing as astronaut Buzz Aldrin looked on from the audience and heralding the liberation of Europe from the Nazis AFP/Getty President Trump delivers State of the Union address He also led the House chamber in singing happy birthday to a Holocaust survivor sitting with first lady Melania Trump. "Together, we represent the most extraordinary nation in all of history. What will we do with this moment? How will we be remembered?" Mr Trump said Getty President Trump delivers State of the Union address Congresswoman Alexandria Ocasio-Cortez – dressed in white in an act of solidarity with other women – declined to join a standing ovation for Donald Trump despite his purported call for “unity” Reuters President Trump delivers State of the Union address The president ticked through a litany of issues with crossover appeal, including boosting infrastructure, lowering prescription drug costs and combating childhood cancer Getty President Trump delivers State of the Union address Republican Veronica Escobar reacts as President Trump claims that El Paso, Texas, has become safer due to a wall along the border with Mexico Reuters President Trump delivers State of the Union address Despite no one working in the White House Office of National Aids Policy, and having sacking his HIV advisory council last year, Mr Trump pledged to inject funds to stop the spread of the disease in America by 2030 Getty Images President Trump delivers State of the Union address "Scientific breakthroughs have brought a once-distant dream within reach," the president said. “Together, we will defeat Aids in America and beyond." he said Reuters President Trump delivers State of the Union address Trump led the House chamber in singing happy birthday to a Holocaust survivor sitting with first lady Melania Reuters President Trump delivers State of the Union address He also appealed to his political base, both with his harsh rhetoric on immigration and a call for Congress to pass legislation to prohibit the "late-term abortion of children” EPA President Trump delivers State of the Union address Women from both political parties wore white outfits tonight at the behest of the Democratic Womens Working Group to honor the legacy of women's suffrage in the United States AFP/Getty President Trump delivers State of the Union address He devoted much of his speech to foreign policy, another area where Republicans have increasingly distanced themselves from the White House EPA President Trump delivers State of the Union address Trump greets Speaker of the House Nancy Pelosi, alongside Vice President Mike Pence AFP/Getty President Trump delivers State of the Union address US First lady Melania Trump (left) with Grace Eline and Joshua Trump, special guests of President Donald Trump AFP/Getty President Trump delivers State of the Union address Trump announced details of a second meeting with North Korea's Kim Jong Un, outlining a summit in Vietnam starting on 27 February AFP/Getty President Trump delivers State of the Union address "If I had not been elected president of the United States, we would right now, in my opinion, be in a major war with North Korea," he said AFP/Getty President Trump delivers State of the Union address *** BESTPIX *** WASHINGTON, DC - FEBRUARY 05: Democratic members of the House of Representatives applaud as President Donald Trump delivers the State of the Union address in the chamber of the U.S. House of Representatives at the U.S. Capitol Building on February 5, 2019 in Washington, DC. President Trump's second State of the Union address was postponed one week due to the partial government shutdown. (Photo by Zach Gibson/Getty Images) Zach Gibson Getty President Trump delivers State of the Union address Supreme Court Justices John Roberts, Elena Kagan and Neil Gorsuch laugh AFP/Getty President Trump delivers State of the Union address President Trump greets lawmakers after delivering his second State of the Union address EPA President Trump delivers State of the Union address Independent Senator from Vermont Bernie Sanders holds his notes EPA

The investigation will “allow us to investigate any credible allegation that financial interests or other interests are driving decision-making of the president or anyone in the administration”, Mr Schiff, the chairman of the House Intelligence Committee, said, announcing the new probe.

Representative Jerry Nadler, the House Judiciary Committee chairman, meanwhile warned that his committee is considering forcing acting attorney general Matthew Whitaker to answer questions during testimony, and not just cite executive privilege.

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Anticipating the potential for Mr Whitaker to cite that privilege, Mr Nadler said he had already written up a subpoena to keep in his back pocket.

“To be clear, I hope never to use this subpoena,” Mr Nadler said in a statement.

He continued: “Weeks ago, we gave Mr Whitaker a list of questions we hope to ask him about his communications with the White House and his refusal to recuse himself from oversight of the special counsel’s investigation. If he appears on time and ready to answer those questions, the subpoena will be entirely unnecessary.”

On Thursday, the man set to replace Mr Whitaker in the Justice Department, William Barr, cleared a major hurdle in the Senate on his way to confirmation, with the Senate Judiciary Committee voting in favor of advancing his nomination to the full Senate.

Mr Barr, a Justice Department veteran and highly respected lawyer in Washington, previously served as attorney general during the administration of President George HW Bush.

When asked during his Senate confirmation hearing, Mr Barr indicated that he would strive to be transparent with his oversight of the special counsel investigation run by Robert Muller. Mr Mueller’s probe, which has run for nearly two years, is reportedly nearing conclusion.

“I believe it is in the best interest of everyone – the president, Congress, and most importantly, the American people – that this matter be resolved by allowing the special counsel to complete his work,” Mr Barr said during his hearing last month. “The country needs a credible resolution of these issues. If confirmed, I will not permit partisan politics, personal interests, or any other improper consideration to interfere with this or any other investigation.”

Mr Trump has repeatedly denied any collusion between his campaign and Russian forces, even as the special counsel’s office has charged several individuals involved in the campaign.