Which U.S. Presidents are Rh-?

Disclaimer: This blog, all of its content and all of my posts are for Entertainment Purposes Only. Approval of comments does not equal agreement with content. Read at your own risk. Please note that comments will not be approved unless you use your real name. You can use first name only, if no one else has commented under that name before. Otherwise use first name and last initial. If that has been taken, use your full first and last name. No exceptions. Thank you for understanding.