BOSTON (AP) — A judge has declared a mistrial in the corruption case against former Massachusetts Treasurer Tim Cahill, and Cahill is calling it ‘‘total vindication.’’

Attorney General Martha Coakley says she hasn’t decided yet whether to re-try Cahill on charges he conspired to run $1.5 million in taxpayer-funded lottery ads to help his unsuccessful 2010 gubernatorial campaign.

Judge Christine Roach declared a mistrial Wednesday after jurors said they were hopelessly deadlocked on two conspiracy charges against Cahill.

The case was the first real test of a 2009 state ethics law. Before the new law was passed, an allegation of conflict of interest would have been a possible civil rather than criminal violation.