Chicago Mayor Rahm Emanuel joined a group that is urging former US Secretary of State Hillary Clinton to run for president in 2016.

Emanuel, who is Jewish and who used to work as White House aide to presidents Barack Obama and Bill Clinton, on Friday joined the Ready For Hillary group, Reuters reported.

Emanuel, who also served in the US House of Representatives, will headline two fundraisers for the group in June, according to Reuters. His support comes less than a week after Virginia Senator Tim Kaine also backed the effort.

“I’ve seen firsthand how Hillary has inspired women and men, and girls and boys, here in America and across the globe, and I know that as president, she would continue to move our country forward,” Emanuel said in a statement from Ready For Hillary.

The group — a super PAC that voluntarily caps donations at $25,000 — is not officially affiliated with Clinton, who says she will decide whether to pursue the White House after November’s congressional elections. But it boasts the backing of numerous Democratic officials and donors.

Hillary Clinton, former first lady, speaks to students at UCLA, in Los Angeles, in March (photo credit: AP/Nick Ut)

Hillary Clinton, former first lady, speaks to students at UCLA, in Los Angeles, in March (photo credit: AP/Nick Ut)

Clinton is considered a favorite to be the Democratic nominee in 2016 if she chooses to run again.

Preliminary polling shows her leading other potential White House aspirants after she served for four years as Secretary of State under Obama.

The former first lady and New York senator lost the hard-fought 2008 nomination battle to then-Illinois Senator Obama, and has since openly spoken about the difficulties of presidential campaigns.