Indiana Republican Senator Jim Tomes as proposed a bill that would make it a crime for transgender people to use public bathrooms and locker rooms that do not conform to their sex at birth. Other states, including Florida, have proposed similar measures in the past.
Gender Identity Watch opposes these bills because they harm gender nonconforming Women and Girls by subjecting them to arrest. You can watch Cathy Brennan discuss this here.
Indiana bill targets bathroom use by transgender people – Chicago Tribune
Senate Bill 2