The Liberty Legal Institute filed complaints with the Federal Communications Commission Wednesday in Plano over a tape-recorded phone call delivered to more that one million Texans.

As KVUE News reported Tuesday, a group trying to defeat Proposition 2 made those phone calls, urging people to vote against the constitutional amendment that would ban gay marriage.

In its complaint, Liberty Legal says the phone call was designed to "confuse voters that favor the amendment using deceptive practices." and argues the call illegally went out to people who had registered for the National Do Not Call list.

However, the FCC says it does not regulate the content of political advertisements and the Do Not Call list does not apply to political campaigns.