Sen. Jim Bunning (R-Ky.) continued his assault on his party’s leadership Tuesday, calling out fellow Kentucky Republican and Senate Minority Leader Mitch McConnell for allegedly trying to impede his re-election fundraising efforts.

According to an Associated Press report, Bunning said during a conference call Tuesday that McConnell and National Republican Senatorial Committee Chairman John Cornyn (Texas) have made an effort to fuel doubts about Bunning’s 2010 prospects in the minds of possible donors.

Previously, Bunning has charged that Cornyn and McConnell have been working to recruit a primary challenger to run against him.

Last month, state Senate President David Williams (R) met with officials at the NRSC — a visit that has been described as a “courtesy.—

Bunning has repeatedly said he is running for re-election in 2010, even as doubts about his viability have grown among party strategists and private polling has shown him to be vulnerable.

Bunning showed just $150,000 in his campaign account at the end of December. But he has said he will raise $2 million by the end of the second quarter of this year.