HELENA, Mont. -

Democratic U.S. Senate candidate John Bohlinger says he will also use his campaign to lead an effort to change the Montana Constitution.
Bohlinger says civil rights are threatened by warrant-less invasions by the federal National Security Agency.
He said Tuesday he wants to expand constitutional restrictions on warrant-less searches to cover digital communications. He says it would send a message to federal agencies.
It takes nearly 50,000 signatures from registered voters to change the Constitution. Bohlinger says he will lead the signature-gathering effort as he runs against Lt. Gov. John Walsh in the Democratic primary.
Bohlinger previously served as a Republican lieutenant governor and state senator.