The terror attacks in India next door have emphasized the instability in the region.
Socially conservative and telegenic, Alaska's governor livens the ticket but is questioned on experience.
Evidence mounts that international sanctions are having an impact.
Communists oppose the pact with the US, which would give India access to nuclear fuel and technology, threatening to bring down the government.
Afghans sought help for its $50 billion five-year plan as donors met in Paris June 12.