Senate Judiciary Committee Chairman Lindsey Graham on Wednesday opened a hearing about the Mueller report into Russian collusion during the 2016 presidential race by announcing he plans to investigate pro-Clinton law enforcement officials' targeting of President Trump.

“Once the Mueller report is put to bed, and it will be soon, this committee is going to look long and hard at how all of this started,” Graham, R-S.C., said.

The panel met Wednesday to grill Attorney General William Barr about special counsel Robert Mueller's report, which Graham and other Republicans say exonerates Trump of wrongdoing.

Democrats believe Trump attempted to obstruct the probe and blocked adequate inquiry into collusion with Russia.

Graham outlined Trump’s willingness to cooperate with Robert Mueller and reviewed the FBI’s probe into Hillary Clinton’s private email server, run by FBI agents who texted about their opposition to Trump and then launched a counterintelligence probe into his campaign.