Updated: October 13, 2015 11:15 PM ET | Originally published: October 13, 2015 9:27 PM EDT

It didn’t take long for the other candidates on stage to take swipes at Hillary Clinton during the first Democratic debate Tuesday, with three of them making subtle jabs at the frontrunner in their opening statements.

“I have learned how to get things done because I am very clear about my principles,” Former Maryland Gov. Martin O’Malley said, in what seemed like a veiled swipe at Clinton’s shifting policy positions.

“I’m very proud that over my almost 30 years of public service, I have had no scandals. I’ve always been honest. I have the courage to take the long-term view, and I’ve shown good judgment. I have high ethical standards,” former Rhode Island Gov. Lincoln Chafee said, in what seemed like a reference to the controversy over Clinton’s email.

“Millionaires and billionaires are pouring unbelievable sums of money into the political process in order to fund super PACs and to elect candidates who represent their interests, not the interests of working people,” Vermont Sen. Bernie Sanders, who does not have a super PAC backing him, said in seeming reference to Clinton’s super PAC.

Write to Tessa Berenson at tessa.berenson@time.com.

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