Actually it’s illegal to run them over.
In Texas, we made it illegal to run over political signs but legal to run over political protestors.
True.
https://www.capitol.state.tx.us/tlodocs/851/billtext/html/HB00250I.htm
North Dakota, North Carolina, Florida, Tennessee, and Rhode Island have proposed or passed similar legislation:
https://www.cnn.com/2017/08/18/us/legislation-protects-drivers-injure-protesters/index.html