No American president has done as much to restrict abortion as Donald Trump. When he was running in 2016, he promised to appoint Supreme Court justices who would overturn Roe v. Wade, and his three nominees helped do precisely that in the 2022 Dobbs decision. Twenty-one states have since enacted tight restrictions. Yesterday, Arizona’s highest court reinstated an 1864 law that bans nearly all abortions.

These laws have proven to be unpopular. When abortion access has appeared on the ballot since 2022, it has consistently won, even in red states like Kansas, Kentucky and Montana. A Wall Street Journal poll last month found that abortion stood out from immigration, inflation and foreign wars as the only major issue on which most voters trusted President Biden more than Trump.

All of this helps explains why Trump has tried to reduce his vulnerability on the issue — and why the Biden campaign is already running advertisements about abortion. “Donald Trump did this,” reads the onscreen text at the end of an ad released this week. It focuses on a Texas woman who nearly died during a miscarriage after a hospital refused to treat her.

Trump released his own video this week, meant to serve as his defining statement on the issue. He said that states should be free to set their own laws, which is the post-Dobbs status quo. In so doing, he tried to distance himself from his past support for a federal ban.

This back-and-forth will be a theme of the 2024 campaign. Democrats will try to focus voters on abortion, while many Republicans will try to shift attention elsewhere. Today’s newsletter offers four key points to help you make sense of the debate.

1. The politics of abortion have changed.

Before Dobbs, polls suggested that the issue didn’t offer a big political advantage to either party. Most voters favored both significant access to abortion and significant restrictions, which put them to the left of Republican politicians and to the right of Democratic politicians.