My thoughts on Senator Obama

Can someone please explain to me how any rational, logical voter could select Senator Obama for President?  He is a fantastic speaker, and is capable of connecting with listeners on a visceral, emotional level - I understand the attraction there.  But his relative lack of experience is overwhelming to me.  He has yet to finish his first term at the national level of government!  I have great respect for those who can admit that voting for Obama is a vote by the heart and not the head, but I don't see how anyone could make a rational, fact-based case for his presidency.