I worry that too much of Romney's criticism is driven by what he thinks is best politically, and not by any larger strategic vision

From The Wall Street Journal:

Mitt Romney's labeling of Russia this week as America's "No. 1 geopolitical foe" has drawn attention to his emerging hawkishness on several foreign policy fronts, from China's monetary policy to the war in Afghanistan—a trend that contrasts to his more muted style on domestic issues.

The Russia remark has fanned concerns among both Romney supporters and nonpartisan foreign-policy experts that Mr. Romney's desire to contrast himself with President Barack Obama has led the GOP candidate to take positions that would be difficult to maintain if he wins the presidency.

"I think Obama's foreign policy is seriously flawed, but I worry that too much of Romney's criticism is driven by what he thinks is best politically, and not by any larger strategic vision," said Dimitri Simes, a Russia expert who was a Romney foreign-policy adviser in 2008.

Mr. Romney's Russia blast came after Mr. Obama was heard on an open microphone in South Korea this week promising Russia's president more "flexibility" on arms-defense talks after the November election. Those comments drew widespread condemnation from Republicans, including House Speaker John Boehner, who wrote to Mr. Obama asking him to "clarify" what he meant.