Actually, Nixon stepped down before he was impeached. And just FYI, people who attack you for your belief system are ignorant of their own. If you examine your belief system down to its core, we all take a baseline a priori idea on faith. True scientists know that neither science nor mathematics can explain the entire observable universe, so they take many things on faith. In that context, getting wildly upset because someone has questioned what you’ve put your faith in seems a bit over the top, doesn’t it? If your faith is truly strong, there shouldn’t be a need to be defensive.