A former aide to President Obama said he thinks Obama should have done more in response to Russian meddling in the 2016 presidential election.

During an interview with Politico, former national security adviser Thomas Donilon said there's "no doubt about it" that the former president should have taken more action.

“Given the fact that they were attacking a fundamental element of our democracy,” Donilon said, the Obama administration should have been “pushing back harder and publicly.”

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That “would have been a better course of action, frankly,” he added.

President Trump in recent weeks has gone after Obama for his response to the Russian election meddling.

On Sunday, Trump questioned why Obama did "nothing when he had info before the election."

Last Friday, Trump met with Russian President Vladimir Putin at the Group of 20 summit in Germany. Trump said he "strongly pressed" Putin on the Russian election meddling and the Russian leader "vehemently denied it."

Trump has not said whether he accepted Putin's denial.