sentence1: When Stronach was with the Conservatives she dated fellow MP Peter MacKay. In an interview in the Toronto Star on January 8, 2005, Stronach confirmed that she and MacKay were dating. Stronach, elected as a Conservative in the 2004 election, crossed the floor to the Liberal Party on May 17, 2005. She did not comment on what impact this would have on their relationship. On May 18, 2005, MacKay told the CBC that his relationship with Stronach was indeed over. Stronach crossed the floor from the Conservative party directly to Paul Martin's Liberal cabinet in May 2005. Stronach was previously married to Olympic speed-skating champion Johann Olav Koss of Norway, then divorced in 2005.
sentence2: Johann Olav Koss was married to MP Peter MacKay's ex-girlfriend.