The Trump administration is moving forward on a plan to allow the importation of cheaper drugs from Canada and other countries as part of its effort to reduce prescription costs.

The Food and Drug Administration will announce a rule letting states develop plans to import certain prescription drugs from Canada, federal officials said. About a dozen states, including Colorado and Florida, have pressed for permission to import drugs that meet U.S. quality standards.

In addition, draft guidance released Wednesday by the Department of Health and Human Services would enable certain medications made and sold in other countries to be imported to the U.S.

Opening up U.S. markets to imported drugs is a central plank of the administration’s effort to reduce drug prices, and federal officials say it would let Americans attain the same cost savings as consumers in other countries. It is also likely to be a major talking point for President Trump as the 2020 election kicks off.

Industry groups have argued the administration’s plan could threaten patient safety by letting in substandard or counterfeit drugs.