top spot on her party's list. During the campaign, she published Linkse lente (Left-wing Spring), a book co-authored by Michiel Zonneveld, which blends her political vision and personal biography. In the 2006 election the party lost another seat. In 2007, she took over the private member's bill of Wijnand Duyvendak, who worked together with Niesco Dubbelboer of the Labour Party and Boris van der Ham of D66, to allow for a non-binding corrective referendum. In April 2010 the party congress voted against including the referendum in the party manifesto. In the run-up to the 2010 elections, Halsema's political profile rose: she was given the Thorbecke prize for political eloquence. and she was elected by Intermediair as the best candidate for Prime Minister. During the 2010 election, GroenLinks went from seven to ten seats. The party, under Halsema, negotiated with the VVD, the Labour Party and D66 to reach agreement on a new "Purple Plus"-government, but the negotiations failed. On 17 December 2010, Halsema announced that she would leave parliament and that Jolande Sap was elected as the new leader of GroenLinks. She formally left parliament in January 2011. In 2016, she made public in her political memoire Pluche (Plush) that after the 2012 election she was asked to consider becoming minister of Development Cooperation by Lodewijk Asscher, the Labour Party leader, but the VVD vetoed this. Mayor of Amsterdam On 27 June 2018, she was appointed Mayor of Amsterdam and began serving a six-year term on 12 July 2018. She is the first woman to hold the position fully as Guusje ter Horst and Kajsa Ollongren held the position previously in an ad interim manner (for 14 days in 2001 and 21 days in 2017 respectively). Also, Halsema was a first GreenLeft member to become Amsterdam's mayor. In the Netherlands, protests were also taking place on the Dam on 1 June 2020 for George Floyd. Halsema was criticised because of the crowd gathering and the 1.5 meter (5') safety issue from COVID-19, it was impossible to manage the 1.5 meter rule between the protesting citizens which was a must for safety reasons. Halsema was criticised on the Dutch news by a lot of people in the medical field for not taking action and lack of responsibility. In Den Haag and Rotterdam, there were also protests but where the 1,5 meter safety measurement had been followed and the second protest became