It all started when San Antonio's City Council blocked Chick-fil-A from opening a store at the airport because the fast food chain makes contributions to organizations that do not support the LGBT community.
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Republican lawmakers responded with a measure that would ban local governments from taking "adverse action" against an individual or business based on affiliations or contributions to a religious organization.
Democrats say the bill invites discrimination.
The measure needs one more Senate vote before moving to Gov. Greg Abbott's desk.