Alright, this is my last message, but I'll try to explain it. This is an example of DeMorgan's law.

Let's call "support" A, and "50%" B, just so we can move it away from natural language. Not A means "not support" or "don't support".

The headline can be expressed as "not A < B". Using DeMorgan's law, we can change that to an equivalent statement of "A >= B".

Now, convert it back to natural language and that's "support >= 50%".

Again, I'm not making a claim on the validity. I am only expressing what the headline says. Headlines can be wrong, and the article may even contradict it. That doesn't affect the headline though.