From Wkipedia, Legal Affairs of Donald Trump

Lawsuits 1973–1999 Trump initially came to public attention in 1973 when he was accused by the Justice Department of violations of the Fair Housing Act in the operation of 39 buildings. The Department of Justice said that black "testers" were sent to more than half a dozen buildings and were denied apartments, but a similar white tester would then be offered an apartment in the same building.[9] The government alleged that Trump's corporation quoted different rental terms and conditions to blacks and made false "no vacancy" statements to blacks for apartments they managed in Brooklyn, Queens, and Staten Island.[10] Representing Trump, Roy Cohn filed a counter-suit against the government for $100 million, asserting that the charges were irresponsible and baseless.[9][11] A federal judge threw out the countersuit, calling it a waste of "time and paper".[12] Trump settled the charges out of court in 1975 without admitting guilt, saying he was satisfied that the agreement did not "compel the Trump organization to accept persons on welfare as tenants unless as qualified as any other tenant".[13] Tony Schwartz, the ghostwriter of Trump's book, The Art of the Deal, said that the housing case was "a classic example" of Trump being "a counterpuncher": someone accuses Trump of doing something horrible, and he "goes back at them with all guns blazing.... And admits nothing." If Trump loses, he will "declare victory".[14] The corporation was required to send a bi-weekly list of vacancies to the New York Urban League, a civil rights group, and give them priority for certain locations.[15] Several years later (in 1978) the Trump Organization again was in court for violating terms of the 1975 settlement; Trump denied the charges.[9][12][16] 1980s In 1985, New York City brought a lawsuit against Trump for allegedly using tactics to force out tenants of 100 Central Park South,[17] which he intended to demolish together with the building next door. After ten years in court, the two sides negotiated a deal allowing the building to stand as condominiums.[18] In 1988, the Justice Department sued Trump for violating procedures related to public notifications when buying voting stock in a company related to his attempted takeovers of Holiday Corporation and Bally Manufacturing Corporation in 1986. On April 5, 1988, Trump agreed to pay $750,000 to settle the civil penalties of the antitrust lawsuit.[19] 1990s Business In late 1990, Trump was sued for $2 million by a business analyst for defamation, and Trump settled out of court.[20] Briefly before Trump's Taj Mahal opened in April 1990, the analyst had said that the project would fail by the end of that year. Trump threatened to sue the analyst's firm unless the analyst recanted or was fired. The analyst refused to retract the statements, and his firm fired him for ostensibly unrelated reasons.[21] Trump Taj Mahal declared bankruptcy in November 1990, the first of several such bankruptcies.[22] After, the NYSE ordered the firm to compensate the analyst $750,000; the analyst did not release the details of his settlement with Trump.[23]