WASHINGTON (AP) — Democrats set to run the House for the first time in eight years have a brimming list of priorities to tackle, topped by election laws and ethics rules, prescription drug prices and infrastructure.

But with the 2020 presidential and congressional elections on the horizon — and yes, they're already coloring decision-making — most Democratic proposals have a better chance of becoming campaign issues than enacted law.

One thing seems certain: A Democratic-controlled House will mean plenty of hearings and investigations. Newly armed with the power to set the agenda and issue subp...