 seen as a direct slap at Mr. Putin, who is known to value such high-level visits as a validation of Russian prestige. While the White House may be using the meeting as leverage to win cooperation as it seeks the return to the United States of Mr. Snowden, who is now staying at a Moscow airport, the reconsideration also reflects a broader concern that the two countries are far apart on issues like Syria, Iran, arms control and missile defense.        </p><p itemprop="articleBody">
The <a title="Times articl