The weakness of freedom of speech is it also allows freedom of lying. It's the cost of it. I think there could/should be an amendment to constitution that prevents government officials from consciously lying to people
Take Obama's: 'If you like your health care plan, you'll be able to keep your health care plan' as an example. He repeated this message for many many times: https://www.politifact.com/obama-like-health-care-keep/
How do you objectively decide:
1) Is this statement true?
2) Did he lie about it?
Also, how do you handle "if there is something I should not know, do not tell me"?