In the 2019 elections, Joanna Senyszyn ran for the Sejm on the SLD list in the Gdynia constituency, receiving 36,405 votes and winning a seat as a deputy in the 9th term.

She became deputy chairwoman of the Parliamentary Team for Equal Rights of the LGBT+ Community, the Parliamentary Women's Rights Team and the Parliamentary Team for a Secular State. She is a member of the Parliamentary Women's Group and an activist with the Society for the Care of Animals.

She describes herself as a feminist, optimist, LGBT ally, atheist and anticlerical.

Joanna Senyszyn:

  • It is important that our voters vote for Robert Biedroń in the first round.
  • Poles usually choose the so-called lesser evil. Let us vote that way in the second round.
  • We want workers to receive decent wages and pensioners to receive decent pensions.
  • 60% of Poles want to live in a secular state. They have had enough of paedophile priests, priests flaunting their wealth and engaging in politics.
  • The Polish Church is demoralised.
  • At present, the Church is the largest landowner in Poland after the State Treasury.
  • The state loses the most because the Church is exempt from income tax.
  • 80% of Poles believe that the Church should not have financial privileges.
  • There should be transparency regarding the Church's income. At present, everything is hidden. The Church conducts business activity and runs several hundred schools.
  • The best solution would be to introduce a church tax. Everyone who declares that they are Catholic should pay a church tax on their income.
  • Poland displays characteristics of a confessional state.
  • Our draft bill designed to ensure the secularity of the state is before the Sejm.
  • Politicians speak from the church pulpit; this is an absolute scandal.
  • The equality guaranteed by the Constitution must be put into practice. People who want equality should vote for the Left, for Robert Biedroń.
  • In Poland, one-third of couples get divorced. Divorced people enter into new relationships. There is no threat to marriage if LGBT people enter into such relationships. We all love in the same way.
  • Women make up 43% of the SLD parliamentary caucus in the Sejm.
  • I am an atheist; I have not undergone apostasy. I do not feel the need to undertake such acts.