An investigation looked into robocalls that told voters in Maryland to stay home, even while the polls were still open.
Paul Schurik, Ehrlich's de-facto campaign manager, and Julius Henson, a Baltimore political consultant, were indicted by a grand jury in Baltimore.
The case involves tens of thousands of anonymous robocalls placed on election night that told voters to stay home even though the polls were still open.
Schurick and Henson have been charged with three counts of conspiracy to violate state election laws, as well as other charges. Ehrlich was not accused of any wrongdoing.
If convicted on all the charges, the two men could face more than 20 years in prison. Arraignment is scheduled for July 18.