Former President Obama on Friday took a swipe at President TrumpDonald John TrumpTrump says inviting Russia to G7 'a question of common sense' Pentagon chief does not support invoking Insurrection Act Dershowitz: Does President Trump have power to declare martial law? MORE over those who have been caught up in special counsel Robert MuellerRobert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE's probe.

"They promised to take on corruption. Remember that?" Obama said while going after Trump and Republicans during a Democratic campaign event in Milwaukee.

"They have gone to Washington and just plundered away. In Washington, they have racked up enough indictments to field a football team," he said.

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"Nobody in my administration got indicted." 

As of this month, Mueller's team has indicted or secured guilty pleas from 32 people as part of his sprawling probe into Russian meddling in the 2016 election.

Four of those people include former Trump campaign adviser George PapadopoulosGeorge Demetrios PapadopoulosNew FBI document confirms the Trump campaign was investigated without justification Republicans plow ahead with Russia origins probe AG Barr just signaled that things are about to get ugly for the Russia collusion team MORE, former Trump campaign chairman Paul ManafortPaul John ManafortHarris, Jeffries question why Manafort, Cohen released while others remain in prison Cohen released from federal prison to home confinement due to coronavirus concerns Advocates call on states to release more inmates amid pandemic MORE, former Trump campaign aide Richard Gates and Trump's former national security adviser, Michael Flynn.

Trump has repeatedly slammed the investigation as a partisan "witch hunt" and called for it to be ended.

Obama on Friday also took aim at Republicans who criticized Democratic presidential candidate Hillary ClintonHillary Diane Rodham ClintonTrump, Biden battle to shape opinion on scenes of unrest Sessions accepts 'Fox News Sunday' invitation to debate, Tuberville declines The Memo: Trump lags in polls as crises press MORE's emails during the 2016 election cycle. He alluded to a New York Times report this week that said Russia and China are eavesdropping on Trump’s personal phone calls.

"They didn't care about emails," Obama said. "And you know how you know? Because if they did, they'd be up in arms right now as the Chinese are listening to the president's iPhone that he leaves in his golf cart. It turns out, I guess it wasn't that important.”