At the
2012 state election, Lindgren contested the
seat of Inala, a safe
Labor seat held by
Annastacia Palaszczuk (a future
premier). She failed to win the seat, but did record a
two-party preferred (2PP) swing of 14.63 points towards the LNP, finishing with 43.10% of the final 2PP vote. Following the resignation of LNP
senator Brett Mason in April 2015, Lindgren was one of nine candidates to contest the casual vacancy, with her chief opponent being
Bill Glasson, a former president of the
Australian Medical Association. She won the vote, and at the same time, was also
preselected for the third position on the LNP senate ticket at the
2016 federal election. A sitting of the Queensland Parliament formally appointed Lindgren to fill the vacancy on 21 May 2015. She chose to join the federal
Liberal partyroom (rather than the
Nationals), as LNP members may choose between the two. The
Sydney Morning Herald reported that Lindgren was a "surprise candidate" who "opposes gay marriage, abortion and euthanasia" after the LNP opposed Glasson's support for homosexual activism. She was defeated at the
2016 federal election. Lindgren joined
Cory Bernardi's
Australian Conservatives in 2018 and ran on the party's Queensland
Senate ticket at the
2019 federal election. ==Personal life==