Former President Obama on Friday took a swipe at President TrumpDonald John TrumpGrassroots America shows the people support Donald Trump Trump speaks to rebel Libyan general attacking Tripoli Dem lawmaker: Mueller report shows 'substantial body of evidence' on obstruction MORE over those who have been caught up in special counsel Robert MuellerRobert Swan MuellerSasse: US should applaud choice of Mueller to lead Russia probe 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.

ADVERTISEMENT

"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 PapadopoulosGeorge Papadopoulos urges Barr to investigate examples of 'spying' while he was campaign aide Ten post-Mueller questions that could turn the tables on Russia collusion investigators Rand Paul blocks resolution calling for release of Mueller report MORE, former Trump campaign chairman Paul ManafortPaul John ManafortNew normal: A president can freely interfere with investigations without going to jail Kremlin: No evidence of election interference in Mueller report Heavily redacted Mueller report leaves major questions unanswered 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 ClintonGrassroots America shows the people support Donald Trump Ex-FBI official: 'Links and coordination' with Russia happen everyday Ex-FBI agent: Americans should be 'disgusted' by Russian interference in Mueller report 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.”