Louisville, Ky. (WHAS11) - A rising star in the democratic party plans to campaign with Grimes at the University of Louisville on Sunday.
Massachusetts Senator Elizabeth Warren will join Grimes at the Red Barn on the UofL campus on June 29.
Her visit comes after McConnell helped defeat Warren's bill aimed at allowing people to refinance their student loan debt at lower rates.
McConnell called Warren's bill a political stunt and blamed rising interest rates on Obamacare, which stopped allowing private banks to provide student loans.
The republican party of Kentucky said Grimes is showing her true colors campaigning with Warren, whom they call an ultra-liberal partisan democrat opposed to Kentucky coal.