In 1955 Rometsch fled to West Germany. Her first marriage ended in divorce. Her second marriage was to Rolf Rometsch, a sergeant in the West German air force. On 6th April 1961 she arrived in the United States with her husband who had been assigned to his country's military mission in Washington.
While living in Washington she became a regular visitor to the Quorum Club. This was a private club in the Carroll Arms Hotel on Capitol Hill that had been established by Bobby Baker. As Baker pointed out in Wheeling and Dealing its "membership was comprised of senators, congressmen, lobbyists, Capitol Hill staffers, and other well-connecteds who wanted to enjoy their drinks, meals, poker games, and shared secrets in private accommodations".
In 1961 Bill Thompson, a close friend of President John F. Kennedy, met with Baker. According to Anthony Summers (Official and Confidential: The Secret Life of J. Edgar Hoover) Thompson asked Baker if he would arrange a meeting between Romesch and Kennedy. Baker later said that: "He (Kennedy) sent back word it was the best time he ever had in his life. That was not the only time. She saw him on other occasions. It went on for a while."
J. Edgar Hoover received information that Kennedy was having a relationship with Rometsch. In July 1963 Federal Bureau of Investigation agents questioned Romesch about her past. They came to the conclusion that she was probably a Soviet spy. Hoover actually leaked information to the journalist, Courtney Evans, that Romesch worked for Walter Ulbricht, the communist leader of East Germany. When Robert Kennedy was told about this information, he ordered her to be deported.
The FBI had discovered that there were several women at the Quorum Club who had been involved in relationships with leading politicians. This included both John F. Kennedy and Robert Kennedy. It was particularly worrying that this included Mariella Novotny and Suzy Chang. This was a problem because they both had connections to communist countries and had been named as part of the spy ring that had trapped John Profumo, the British war minister, a few months earlier. President Kennedy told J. Edgar Hoover that he "personally interested in having this story killed".
Hoover refused and leaked the information to Clark Mollenhoff. On 26th October he wrote an article in The Des Moines Register claiming that the FBI had "established that the beautiful brunette had been attending parties with congressional leaders and some prominent New Frontiersmen from the executive branch of Government... The possibility that her activity might be connected with espionage was of some concern, because of the high rank of her male companions". Mollenhoff claimed that John Williams "had obtained an account" of Rometsch's activity and planned to pass this information to the Senate Rules Committee, the body investigating Bobby Baker.
The following day Robert Kennedy sent La Verne Duffy to West Germany to meet Rometsch. In exchange for a great deal of money she agreed to sign a statement formally "denying intimacies with important people." Kennedy now contacted Hoover and asked him to persuade the Senate leadership that the Senate Rules Committee investigation of this story was "contrary to the national interest". He also warned on 28th October that other leading members of Congress would be drawn into this scandal and so was "contrary to the interests of Congress, too".
J. Edgar Hoover had a meeting with Mike Mansfield, the Democratic leader of the Senate and Everett Dirksen, the Republican counterpart. What was said at this meeting has never been released. However, as a result of the meeting that took place in Mansfield's home the Senate Rules Committee decided not to look into the Rometsch scandal.