Tennessee Governor Bill Haslam says it will probably be close to the deadline before he decides whether to sign a proposal protecting teachers who allow students to criticize evolution and other scientific theories, such as global warming. The deadline is today. Haslam can also veto the measure or let it become law without his signature. The Republican governor has said he will probably sign the bill. Last week, opponents handed Haslam a petition with more than 3,000 signatures urging him to veto the legislation. Haslam says the petition was impactful, but he also noted the amount of support for the bill in the Legislature.