There is a lot of proof that many Ron Paul votes where changed to Mitt Romney or other republican candidates in Maine, Nevada, Iowa, Florida, NH & SC ect. Also its kinda hard to believe some one who had supporters all over the world lost to Mitt Romney. I believe its only right to investigate it with the vast proof of wrong doing by the GOP.
for further proof: http://www.youtube.com/watch?v=3FmgLBjyqzE
http://www.youtube.com/watch?v=dAPt5cxPEhs
http://www.youtube.com/watch?v=cn8UN9taGwo
and there are meany more.