WASHINGTON – Ten-year Rep. Jane Harman, a Democrat from California, is expected to resign from Congress soon to head the Washington-based Woodrow Wilson Center, according to three major media outlets.

NBC's Andrea Mitchell broke the news on Twitter Monday morning, writing: "[S]ources tell me Jane Harman to quit Congress succeed Lee Hamilton heading Woodrow Wilson Center, DC think tank - will be official tomorrow[.]"

An NBC article added that Harman will become the president and CEO of the Wilson Center, a nonpartisan research institute.

The news was soon confirmed by Mike Allen of Politico, who heard from a "a close friend of Harman's" that the congresswoman's resignation was likely imminent.

The Washington Post's Chris Cillizza also confirmed with "two senior Democratic leadership aides" that Harman intends to quit.

A special election will take place to fill the soon-to-be-open seat in Harman's highly Democratic district.

Harman has been a senior Democratic voice on intelligence and national security issues. Until Democrats lost control of the House last month, she chaired the Homeland Security Subcommittee on Intelligence, Information Sharing, and Terrorism Risk Assessment.

Harman is married to business mogul Sidney Harman, the owner and publisher of Newsweek. She is one of the richest members of the House.