JEFFERSON CITY, Mo. (AP) — A former worker for the marketplace under President Barack Obama’s health care law says she’ll challenge Missouri Sen. Claire McCaskill for the Democratic U.S. Senate nomination.

The St. Louis Post-Dispatch reported Wednesday that Democrat Angelica Earl plans to create a campaign committee for the race soon.

McCaskill first took office in 2007 and is up for re-election in 2018.

Earl is a 31-year-old who lives near Overland in St. Louis County. She was recently laid off from her job as a verification specialist for insurance applicants under the Affordable Care Act. She’s never run for office before.

Earl told the Post-Dispatch that she opposes McCaskill’s call for bipartisan fixes to the health care law. Earl says that doesn’t go far enough and said she wants a single-payer health care plan.