(CNN) The race to court Hillary Clinton has begun.

The former secretary of state and 2016 Democratic presidential nominee has talked about the 2020 election with Sen. Kamala Harris, Sen. Cory Booker, Sen. Elizabeth Warren, Colorado Gov. John Hickenlooper and Los Angeles Mayor Eric Garcetti, according to two sources close to Clinton, and there are plans for her to talk with other contenders.

The meetings with Clinton are a sign that potential Democratic presidential candidates see value in her endorsement. Clinton maintains a devoted group of supporters around the country (she won over 65 million votes just two years ago) and a strong fundraising network.

The sources close to Clinton tell CNN that the five Democrats she has met with and others waiting for a meeting are asking for her support if they run.

"People are direct in saying they want her support," the source said. "Others are reaching out."

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