The Sudbury by-election trial got underway on Thursday.
Pat Sorbara, the premier's former deputy chief of staff, and Sudbury-based Liberal fundraiser Gerry Lougheed Jr. are facing charges stemming from a 2015 by-election.
Sorbara faces two bribery charges under the Election Act, while Lougheed faces one charge.
Sorbara and Lougheed have both pled not guilty.
The pair is accused of offering a would-be candidate, Andrew Olivier, a job or appointment to get him to step aside for Wynne's preferred candidate, Glenn Thibeault.
At the time, Thibeault was a New Democrat MP. He is now the energy minister.
Premier Kathleen Wynne will take the witness stand on September 13.
Included below is a recap of the first day in court.