Winning the Senate put Republicans in charge of both houses of Congress, and leaders promised an end to gridlock. But the major accomplishment so far -- Keystone XL Pipeline approval — was vetoed and homeland security funding barely passed. Now, protection of sex-trafficking victims and confirmation of the first black woman Attorney General are being delayed, and the big challenge: will contrasting proposals for Pentagon spending hold up passage of the entire federal budget? Can the Republicans actually govern? The answer could be crucial for next year's presidential election.