HARRISBURG — Two former aides to one-time state House Speaker John Perzel today entered the first Republican guilty pleas in a legislative corruption case that revolves around the alleged illegal diversion of millions of taxpayer dollars into political campaigns.

At a hearing in Dauphin County court, Samuel Stokes, Perzel’s brother-in-law, pleaded guilty to one count each of conspiracy and conflict of interest. Former Perzel campaign aide Don McClintock pleaded guilty to a single count of conspiracy.

Under agreements with the attorney general’s office, both men are required to cooperate with prosecutors in the consolidated trial of the other Republican defendants that is scheduled to start Sept. 12.

Paul Towhey, one of two former Perzel chiefs of staff charged in the case, is scheduled to enter a guilty plea Friday.

Barring any additional plea deals, that leaves six defendants to stand trial together, including Perzel of Philadelphia and another former high-ranking state representative, Brett Feese of Lycoming County.

A 10th GOP defendant, former Perzel aide John Zimmerman, is charged with hindering apprehension, obstruction and conspiracy. His case is being prosecuted separately.

Stokes, 68, and McClintock, 43, ran the full-time campaign office for Perzel, prosecutors said. Perzel put Stokes on the caucus payroll, but a grand jury said his time was spent primarily on campaign work, they said.