[1] At the 1997 Kenyan General Elections LPK fielded a presidential candidate, Wangari Maathai, who later became a Nobel Peace Prize laureate.
In 2002, the next general elections were held and the Maathai-led party was part of the victorious NARC coalition.
Maathai herself won the Tetu Constituency parliamentary seat.
[2] At the Kenyan general election, 2007, Mazingira was part of the newly created Party of National Unity led by President Mwai Kibaki.
Mazingira won one parliamentary seat at the elections, after Silas Muriuki beat PNU candidate David Mwiraria to clinch the North Imenti Constituency parliamentary seat.