In an article titled, "Refusal to Lead," Republican senator Marco Rubio writes, "The biggest foreign policy problem facing the United States right now is not too much U.S. engagement, but the danger of a world in which we increasingly refuse to lead. There are few global challenges that can be solved without decisive American leadership."

Rubio contends that Obama just ignores the world's problems. "The president's policies have often, in effect, been to just ignore many of these problems. He seems to believe that if left untouched, they will either go away or be solved by others, without consequences for the American people. Unfortunately, this misguided view is also shared by some in my own party," he writes.

And he urges Obama to change course:

Of course, the United States can't be involved in every conflict or solve every problem. But our failure to address our fiscal problems at home has unfortunately given our allies -- whether longstanding ones like Israel, or potential future partners in the Middle East and Asia -- cause to question our staying power and commitment to their security and our shared ideals.

There is no question we need to get our fiscal house in order. But we cannot do so by sacrificing our national security and by forcing our men and women in uniform to bear the brunt of paying to fix a debt problem they did not cause. Congressional Republicans have proposed ways to offset the sequester, automatic budget cuts set to go into effect next month. It's time for the president to propose a way forward other than just raising taxes.

Fulfilling the promise of America will only be possible if we embrace, not continue to run away from, the essential role that our country has played in contributing to global stability. This is a role that has aided our own prosperity and an important part of what makes our country exceptional.

That will require assertive leadership both home and abroad. It's time to take up the challenge.

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