Former President Obama reportedly had words of advice for a group of freshman Democrats late Monday at a private event in Washington where he warned about pursuing bold ideas without plans for implementing them.

According to The Washington Post, which cited sources at the event, Obama counseled new members of Congress from his party on making change in the halls of Capitol Hill.

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“He said we [as Democrats] shouldn’t be afraid of big, bold ideas — but also need to think in the nitty-gritty about how those big, bold ideas will work and how you pay for them,” one attendee told the Post.

“He was speaking to staying in touch with your constituents," added Rep. Haley Stevens Haley Maria StevensUS Chamber of Commerce set to endorse 23 House freshman Democrats Eric Esshaki wins Michigan GOP primary to challenge Haley Stevens The Hill's Campaign Report: Buzz builds around Warren for VP MORE (D-Mich.), who previously served in the Obama administration, according to the newspaper. "Making sure you’re doing the regular communications as well as [recognizing] that there’s oftentime nuances to policymaking and that it takes time."

Obama also reportedly praised Speaker Nancy Pelosi Nancy PelosiPelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare House lawmakers reach deal to avert shutdown Centrist Democrats 'strongly considering' discharge petition on GOP PPP bill MORE (D-Calif.), whom he celebrated as a tough fighter for Democratic policies.

“The reason I love Nancy is because she combines a passion for doing what’s right for our country and our kids, along with a toughness that can’t be matched on the Hill,” the former president said, according to the Post.

The remarks were reportedly seen by some at the gathering as caution against plans for bold progressive ideas such as the "Green New Deal" and "Medicare for all," which critics have said are too costly.

Freshman Democrats such as Rep. Alexandria Ocasio-Cortez Alexandria Ocasio-CortezHouse passes bill to avert shutdown Trump attacks Omar for criticizing US: 'How did you do where you came from?' The Memo: Dems face balancing act on SCOTUS fight MORE (D-N.Y.) have espoused support for such positions in recent months while challenging party leadership on issues such as health care, policy toward Israel and other areas of dispute.