More emails from Hillary Clinton’s time as Secretary of State have been released and one of them mentioned the possibility of shaming Israel.

Clinton’s ex-aid Anne-Marie Slaughter suggested that Clinton work on a campaign, “Pledge for Palestine” to show the U.S.’ commitment to a Palestinian state, which in turn “there would also be a certain shaming effect re Israelis, who would be building settlements in the face of a pledge for peace .”

Slaughter’s idea was inspired by Warren Buffet’s “The Giving Pledge” campaign, which was launched in 2010 in an “effort to invite the wealthiest individuals and families in America to commit to giving the majority of their wealth to the philanthropic causes and charitable organizations of their choice either during their lifetime or after their death.”

Slaughter wanted Clinton to convince someone with Buffet’s financial backing to make a similar pledge to Palestine “together with a very wealthy Muslim.”

“With even 30 calls to the right people in the Clinton fundraising network it should be possible to generate a substantial enough amount quickly enough to capture the public imagination on the heels of the President’s speech and, critically, to serve as an expression of global solidarity with the Palestinians and but also a meaningful promise of material improvements for Palestinians on the West Bank. That could significantly bolster Abbas in a way that could help him stay in the talks. This is what diplomacy beyond the state should mean,” Slaughter continued in her email to the Secretary.

You can read the full email here.