President Obama is going to tackle the Republican effort to scuttle the START treaty head on: Obama Turns New Start Treaty Into Showdown With GOP.

He is pushing for a vote on a signature issue despite long odds, daring Republicans to block an arms-control treaty at the risk of disrupting relations with Russia and the international coalition that opposes Iran’s nuclear program. If he succeeds, Mr. Obama will demonstrate strength following the midterm election debacle. If he fails, he will reinforce the perception at home and abroad that he is a weakened president.

“It’s really high stakes,” said Geoffrey Kemp, a former national security aide to President Ronald Reagan and a scholar at the Nixon Center, a research group in Washington. “I would say it’s the biggest gamble he’s taken so far, certainly on foreign policy.”