US President Donald Trump refuses to allow the Democrats and the public access to his finances. Lawyers Trumps and the Trump organization filed Monday on a lawsuit against the Democrats want to force the release of financial documents.

Trump has long refused to provide information on his financial situation. For example, contrary to normal practice in the US, he has never published his tax returns so far. Usually, presidential candidates do that during the election campaign.

Too complicated and incomprehensible

In the reason Trump said his tax declarations are very complicated and incomprehensible. In addition, the examination of his tax documents is still ongoing. His opponents, however, speculate against the fact that the former tycoon has a lot to hide.

With their newly won majority in the House of Representatives, Democrats are now increasingly pressuring Trump to make statements about his financial situation. The chairman of the audit committee, Elijah Cummings, demanded financial documents from a company. Mazars USA has worked for years with Trump and its accounting firms. Cummings exhibited a so-called subpoena, with which he can force the company under pressure to surrender.

Trump's lawyers argue that this step is inadmissible. They accused the Democrats of conducting a political war against Trump. Instead of working with the president, they were "obsessed" with finding something that could harm him, according to Monday's lawsuit. Trump complains accordingly as a private person, not as a president.

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Researching the "New York Times" How Trump Really Became Rich

The New York Times published a report last fall that showed the tricks the Trumps family apparently evaded taxes. For a year and a half, reporters of the newspaper had evaluated more than 100,000 pages of documents and talked to former employees of the late father Fred Trump.

Result: According to the New York Times, Donald Trump and his siblings founded a front company, among other things, to disguise gifts from their parents. Overall, the parents had transferred a fortune of well over a billion dollars to their children, so that at the then-current tax rate of 55 percent on gifts and inheritances at least $ 550 million in taxes would have been due.

By tax tricks and tax evasion, the Trumps would have paid only $ 52.2 million, the report said. Trump helped lower the value of his parents' real estate. The family has hauled huge sums past the treasury. The "New York Times" and the "Wall Street Journal" received the Pulitzer Prize for research in mid-April.