(CNN) On Monday, House Judiciary Chairman Jerry Nadler announced that he was beginning a broad-scale investigation into Donald Trump's business and political life, the first step in a slow but purposeful attempt by congressional Democrats to build an impeachment case against the President.

Nadler, in an interview with ABC's "This Week," was open about the strategy. "We do not now have the evidence all sorted out and everything to do an impeachment," he said. "Before you impeach somebody, you have to persuade the American public that it ought to happen."

That persuasion campaign began in earnest Monday, with Nadler issuing more than six dozen letters to various Trump administration officials, business partners and campaign officials, seeking answers to a wide variety of questions. The questions deal with, among other topics: potential obstruction of justice, hush money payments to two women alleging affairs with Trump, potential collusion with Russia during the 2016 campaign and violations of the Constitution's emoluments clause.

"In an investigation being coordinated among six to eight House committees, Trump will essentially be on public trial for months to come, with topics that include abuse of power, obstruction of justice, conflicts of interest (including profit from the Trump International Hotel on Pennsylvania Avenue) and money laundering."

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