Espersen was the first person in her family to join a political party. A member of the
Folketinget from 1994, she served as
Minister of Justice from 27 November 2001 to 10 September 2008 and as
Minister of Economic and Business Affairs from 10 September 2008 to 23 February 2010. Espersen served as
Minister of Foreign Affairs from 23 February 2010 to 3 October 2011, making her Denmark’s first female foreign minister and the only woman in such a post in the EU at the time. Espersen was the leader of the
Conservative People's Party and was
Deputy Prime Minister from 9 September 2008 to 13 January 2011. On 13 January 2011, she announced at a press conference at 19.00 pm, briefly after her arrival in Denmark, that she would not continue as leader of the Conservative People's Party. The announcement came after months of increasing pressure, where various issues regarding her work ethics, had gained national attention, and decreasing support in
opinion polls for the party. During her tenure as political leader, support for the Conservative People's Party was reduced from around 10% to below 5%. On 14 January,
Lars Barfoed succeeded Lene Espersen as political leader of the Conservative People's Party. ==Other activities==