Key senators to announce 2020 runs in next few weeks

Democratic Senators Kamala Harris, Cory Booker, Kirsten Gillibrand and Elizabeth Warren are expected to announce their 2020 presidential runs in the next several weeks, the New York Times reports.

The big picture: The four senators, who have spent time scouting potential headquarters, interviewing possible campaign managers and reviewing their political records, will head up a crowded field for the Democratic nomination. Sen. Bernie Sanders, former Vice President Joe Biden and Rep. Beto O'Rourke have also been the subjects of intense speculation, and have performed well in recent polls of prospective candidates.

Details, per the Times:

• "Senator Kamala Harris of California is eyeing Baltimore or Atlanta as a possible base of operations for her likely 2020 presidential bid and is close to bringing on a top aide to run her campaign."
• "Elizabeth Warren, the Massachusetts senator, has completed a detailed review of her writings and political record to identify potential vulnerabilities, and her aides have been scouting headquarters near Boston."
• "Senator Cory Booker of New Jersey has been interviewing possible campaign managers, as well as strategists who could run his Iowa caucus effort."
• "Senator Kirsten Gillibrand has been reaching out to more women than men for campaign roles, though she is expected to pick a man — her current top aide [Jess Fassler] — to manage a campaign likely to be based near her upstate New York home."

Go deeper:

• A presidential map for the 21st century
• The Democrats' wild 2020 free-for-all