It isn't any particular speech patterns but he uses logical fallacies and his supporters fall for them every time.

For example the uses the false dilemma or the false dichotomy as the reason to support the health care bill as if the only way to reform health care is to support the bill. If you do not support the bill you are against health care reform.

There are very few Americans who do not want health care reform to bring the cost down so it is more affordable and more people can be covered. They are in favor of certain provisions that are in the bill, against others and want certain other provisions added.