On the Iran nuclear controversy, Bush indicated there was no progress on agreeing how to stop Iran enriching uranium. Bush favors sanctions, but the Chinese want to limit activity to diplomacy.
Washington also wants Beijing to use its influence with North Korea to curb its nuclear program. But Hu said there are difficulties.
"The six-party talks have run into some difficulties at the moment," Hu said. "I hope the parties will be able to further display flexibility, work together, and create the necessary conditions for the early resumption of talks."
Earlier, at a ceremony welcoming Hu to the White House, Bush linked mutual prosperity to mutual security needs, saying the two countries will deepen cooperation in addressing threats to global security.
Hu's presence in Washington led to a noisy demonstration outside the White House.
(compiled from agency reports)