State Senator Rob Schaaf, R-St. Joseph, and Rep. Paul Curtman, R-Union, co-chaired a proposed constitutional amendment that seeks to protect the privacy of electronic communications.
The amendment would require law enforcement to get a search warrant before accessing electronic data.
Schaaf said the amendment is a response to the controversial NSA domestic spying program.
"The government's use of Big Data to monitor and record the private digital lives of Americans is a legitimate and pervasive threat to our freedom," explained Sen. Schaaf, a family physician. "Missourians should feel secure that their private communications are not being tracked, logged and analyzed by faceless government bureaucrats without justification or cause."
The National Security Agency came under fire after former contractor Edward Snowden leaked classified materials revealing the data mining of telephone records by the NSA.
The federal government has since said it will no longer store the data that it collects.
The Privacy Amendment was passed by the Missouri Legislature and will appear on the August 5 ballot.