Margaret Thatcher. In 1951 she married a wealthy industrialist, Denis Thatcher (b. 1915—d. 2003), who supported her political ambition. The couple had twins, a son and a daughter, in 1953. Thatcher entered office promising to curb the power of the unions, which had shown their ability to bring the country to a standstill during six weeks of strikes in the winter of 1978–79.