As a state senator, Koenig has sponsored or co-sponsored a bills to restrict legal abortions, including 7 in the 2019 session. Koenig is opposed to exceptions for rape or incest. Koenig sponsored "heartbeat bills", which ban early-term abortion. He sponsored a blanket ban on abortions after 8 weeks, which additionally would prohibit abortion sought solely because of the sex, race, or Down syndrome diagnosis of the fetus. In the 2019 session, Koenig was responsible for handling the passage of HB 126 in the State Senate, a bill banning abortions after 8 weeks in all cases except medical emergency, with penalties of 5–15 years in prison.
