Former Ontario Premier Dalton McGuinty and Saskatchewan Premier Brad Wall have been named as the other seven former senators under investigation by the RCMP.
Former Conservative senator David Tkachuk, who quit the Conservative caucus in April to form his own political party, has also been named by the federal police.
The RCMP investigation, which began in September and is looking into allegations of fraud and bribery by former Prime Minister Stephen Harper’s government, also names former senator Andrew Leslie, former prime minister Paul Martin and former premier Mike Harris.
Read more about the RCMP investigation: Former prime minister Stephen Harper leaves office Former Prime Minister David T. Harper, who resigned from the Conservative Party in April, left office in March, following a court battle with the RCMP over his alleged involvement in a bribery scheme.
He was not charged in the probe and had no formal role in the inquiry.
The inquiry was launched following allegations that Harper and his wife were involved in an international bribery scandal involving a former aide to Prime Minister Justin Trudeau.
A former associate of Harper was charged in October with accepting $5 million from the former Harper government.
The federal police have also charged three former ministers and one former minister’s aide with alleged bribery.
The five former ministers were Stephen Harper, James Moore and Brian Mulroney, the prime minister’s former chief of staff.
The other five former officials are Jim Flaherty, Peter MacKay, Brian Clark and Michael Chong.
The nine former senators charged are Stephen Harper and David Terence MacKay.
Harper resigned as prime minister after being found guilty of bribery.
Terence McGuintys resignation The resignation of former Prime Minster Stephen Harper is one of the first notable departures from the Harper government in the course of the probe.
Harper had been under investigation for several years over his ties to the family of a Chinese billionaire who had been convicted of corruption charges and sentenced to three years in prison.
His former chief-of-staff, Nigel Wright, was also under investigation.
His departure came after a federal court ruling that the former prime ministers failure to repay $12 million in unpaid parliamentary expenses could be grounds for his resignation.
The court decision was widely seen as a victory for Wright, but the Conservatives have now admitted Wright may have been involved in the scheme.
The Conservative party had previously maintained Wright was not a party insider and was merely a close friend.
Harper has been the subject of an RCMP investigation into whether he accepted payments for a speech that he gave to the Canadian Bar Association in 2008.
He also faces an RCMP corruption probe into his time as prime minster and the appointment of former cabinet minister and longtime Conservative fundraiser Peter MacDougall to the federal cabinet.
Harper’s lawyer, Andrew MacDougal, has suggested Wright may not have been aware of the arrangement, but that it was not illegal.
MacDougalt said Wright did not know that he would receive a government donation for his speech, but he knew that the donation would be used to fund a trip to China.