Trump's concerns include Iran's ballistic missile program and its involvement in Mideast conflicts, issues that aren't part of the international agreement.
Analysts say chances for a breakthrough appear slim given the two sides' intensifying rivalry in strategic technologies, where China lags behind the U.S.
The stock hit a new high of $171.23 Wednesday before backtracking slightly and then tumbled by more than 11 percent in extended trading after the results were released.
Cambridge Analytica said it has filed papers to begin insolvency proceedings in the U.K. and will seek bankruptcy protection in a federal court in New York.
