Chairman of the US House Judiciary Committee, Jerry Nadler, on Monday announced an investigation into allegations of obstruction of justice, public corruption and other abuses of power by President Donald Trump, his associates and members of his administration.

As a first step, Nadler announced that the Committee has served 81 agencies, entities and individuals believed to have information relevant to the investigation. Those served include Trump’s sons Eric and Donald Jr., son-in-law Jared Kushner and the White House.

The Committee’s investigation will focus on three main areas:

• Obstruction of Justice, including the possibility of interference by the President and others in a number of criminal investigations and other official proceedings, as well as the alleged cover-up of violations of the law;

• Public Corruption, including potential violations of the emoluments clauses of the U.S. Constitution, conspiracy to violate federal campaign and financial reporting laws, and other criminal misuses of official positions for personal gain; and

• Abuses of Power, including attacks on the press, the judiciary, and law enforcement agencies; misuse of the pardon power and other presidential authorities; and attempts to misuse the power of the Office of the Presidency.

Citing “threats to the rule of law,” Nadler described the investigation as an “obligation” of Congress, in order to “provide a check on [alleged] abuses of power” from the Executive branch. In a 75-page report dated February 11, the Judiciary Committee’s House Democratic majority outlines their concerns over “the absence of responsible oversight by the [previous] Republican Majority” for over the past two years. The report includes summaries of hundreds of documents, ranging from letters to lawsuits and aimed at House Democrats’ efforts to provide oversight under the Republican Majority.