FACTBOX-McCain and Obama on diplomacy and foreign relations

(Reuters) - Following are some of the key foreign policy positions of Sen. Barack Obama, who appears set to win the Democratic nomination for November's U.S. presidential election, and Sen. John McCain, the presumptive Republican nominee.

DIPLOMACY IN GENERAL

McCain advocates a more vigorous U.S. role in international diplomacy after the two terms of President George W. Bush and promises a push to rebuild frayed relations with America's allies.

"The United States cannot lead by virtue of its power alone," McCain said in a speech to the World Affairs Council in California. "We need to listen to the views and respect the collective will of our democratic allies."

Obama emphasizes negotiations rather than military action and drew accusations of naivety from Republicans for saying he would talk without preconditions with leaders of hostile states including Iran, Syria, North Korea and Venezuela. He said such talks would, however, need to be well prepared.

"Strong countries and strong presidents meet and talk with our adversaries," Obama said at an August 19 debate. "We shouldn't be afraid to do so. We've tried the other way. It didn't work."

CHINA

McCain says he would keep pressure on China to improve its human rights record but would expand China-U.S. ties.

Obama says as president he would threaten to limit Chinese access to the U.S. market as a bargaining tool to force Beijing to stop manipulating its currency.