Who knows more about the world outside of Wasilla and Alaska-- Obama or Palin?
We know Obama's world view, international travel, work on foreign policy issues in the Senate (bills introduced, passed and/or co-sponsored on nuclear arms, international health, environment, Congo, and more). He has lived in Indonesia and interned in Pakistan. He has an international family spanning multiple continents. He studied international relations at school.
Since campaigning, he's had intensive consultations with foreign policy experts and interacted with world leaders.
He has already demonstrated a prudent foreign policy stance vis a vis Iran (e.g., diplomacy before "bombing" or "obliterating"), and Iraq (e.g., judgement in not supporting the war, proposing a timetable that is now being worked out by Iraq and the current administration). Obama has received more financial support from members of the military overseas than McCain, the veteran. That should send a message.
Obama is clearly respected and admired all over the world, and represents a positive image for America, hope for improved international relations, and fewer enemies and more friends. America could use some of that.
What is Palin's international experience? She's even admitted that she has not been focused on Iraq, which is understandable at some level given her other priorities.
Put foreign policy experience aside-- who is more familiar with the challenges and issues of the large, populated states on the mainland-- Obama or Palin? What contribution can she make on the complex immigration issue? Does she have a grasp of the diverse demographics that make up America, their respective socioeconomic issues, challenges of race relations?
Obama has 12 years of legislative experience at the state and national levels, and an intimate understanding of an inner city. Palin's geographic exposure is limited to a village and a state population smaller than Chicago.
For the past two years, Obama has managed an effective and efficient campaign that has built a grassroots movement, raised unprecedented funds, and taken on the powerful Clinton machine. He has shown he can delegate well, organize, and get along with others.
Palin is doing great work in her own limited environment. She shouldn't be belittled for that. She should be commended. But Obama is far more experienced.