The problem with losing your credibility is that no one (should) believe a word you say anymore.
Truth is Obama has nothing to back him up in reality. He and his minions will try to scare little kids into submission. But in the end, he will do whatever he wants by fiat and nobody has the guts to stop him. Pretty sad day in America when a person, the President, is allowed to rip off and destroy peoples lives for a hoax that stands to pay off the top 1 percent off the backs of the middle class.
Science is never compelling. It just is. You either accept it or you do not accept it and continue believing the Earth is flat. What is compelling is political science. Or the art or persuasion.
I believe exactly and precisely the opposite of anything he says - so, in a way, his statements are very useful, as benchmarks of errors and lies.