mexico city policy

It's President Donald Trump's first official act on the abortion issue. On Monday, the new president signed a presidential memorandum reinstating the "Mexico City" policy — barring U.S. aid from any group that provides or "promotes" abortion overseas. The policy dates to 1984, when Ronald Reagan unveiled it at a United Nations Conference in Mexico City. The Trump version is even broader than the incarnations that previous Republican presidents have adopted.

What does this mean in practice? To help make sense of it we've put together an FAQ.