U.S. President-elect Donald Trump jokes with the press ahead of meeting regarding the filling of cabinet positions | Drew Angerer/Getty Images Czech Stasi spied on Donald and Ivana Trump: report The real estate tycoon considered running for president in 1996, secret files show.

The Czech secret service spied on President-elect Donald Trump and his Czech first wife Ivana in the 1970s and 80s when the country was under Communist rule, German publication Bild reported Wednesday.

A report compiled by the spy agency and obtained by Bild contain details of the couple's marriage contract, including the fact that Trump wanted Ivana to bear three children and she would receive $1 million as a settlement if they divorced.

The intelligence service noted Trump benefited from "a personal relationship with American presidents" and that his company was "free of taxes for 30 years." The New York Times reported that huge financial losses in 1995 created a tax deduction that could have allowed him to avoid paying taxes for 18 years.

A report from 1988 stated Trump wanted to become presidential candidate in the 1996 election and had expressed confidence he would win.

The secret service also monitored Ivana's relationship with her father, who had stayed in what was then Czechoslovakia. They listened to at least one phone conversation a year, opened their correspondence and followed the Trump children when they visited their grandfather.