Ohio's Democratic U.S. Senator is rolling out a proposal that would force employers to warn workers and retrain them when their jobs are about to be eliminated by automation.

Sherrod Brown thinks the issue of how workers are being treated in a fast-evolving economy is one that Democrats could use to beat Republicans in the 2020 elections.

But he says the Democrats running for president aren't talking enough about pro-worker issues.

Brown, who decided in March against a run for the White House, says government needs to do better anticipating how workers will be affected by automation in the coming years.

The legislation he's introducing this week calls for companies to pay for training when employees are impacted by new technology and pay severance to workers who lose their jobs.