Impending Mueller Report May Just be the Beginning of Trump's Investigation Woes

The impeachment of President Donald Trump suddenly looks like much more than just a theoretical possibility.

Democrats on Monday will launch an "abuse of power" investigation that could be easily transformed into an even more serious process, with an expansive demand for documents from Trump's government, his family and even his real estate empire.

The President reacted to his worsening plight with a vehement defense on Sunday, after a week in which testimony from his ex lawyer Michael Cohen deepened his political vulnerability and ahead of the expected filing soon of special counsel Robert Mueller's report.

"Presidential Harassment by 'crazed' Democrats at the highest level in the history of our Country. Likewise, the most vicious and corrupt Mainstream Media that any president has ever had to endure," Trump tweeted Sunday night.

House Judiciary Committee Chairman Jerry Nadler, who would eventually lead any impeachment proceedings, on Sunday signaled a significant escalation into congressional inquiries into the President.

The New York Democrat plans on Monday to request documents from 60 people and entities close to Trump, including from the Department of Justice, the White House and the Trump Organization.

The document trawl will be used "to present the case to the American people about obstruction of justice, about corruption and abuse of power," Nadler said on ABC News' "This Week" on Sunday.

Nadler stuck to the House Democratic position that impeachment "is a long way down the road," apparently in order to avoid Republican arguments that the decision has already been made to try to oust Trump. The document requests are not taking place under the auspices of an official impeachment investigation.

But Nadler said nevertheless that he believes the President had obstructed justice, a potentially impeachable offense. And given his responsibilities and powers, the warning from Nadler took the President's political and legal nightmare to a new plane, and opened a new, more serious stage of the showdown between House Democrats and Trump.

It was the latest sign that investigations sparked by accusations that Trump's campaign team cooperated with Russian election meddling has mushroomed into a relentless examination of Trump's political, personal and business life.

The latest blow to the President further intensified pressure on the White House as Washington waits for another shoe to drop— with Mueller expected to file his long awaited report from Monday onward.

The Nadler investigation, along with parallel probes into Trump's presidency by the House Oversight and Intelligence committees means that the structure of a political investigation into the President based in Congress is now in place, alongside the legal inquiries led by Mueller and prosecutors in New York and other jurisdictions.