Repealing the Patient Protection and Affordable Care Act will not be enough, for a simple reason: Although Obamacare would worsen many of the problems with our system of health-care financing, that system clearly does call out for serious reform.

Barack Obama’s presidency has had profoundly negative consequences for our national security. From debilitating cuts in defense budgets, to gutting national missile defense efforts, to his unwillingness to acknowledge a continuing war against terrorism, to his inability to stem the nuclear proliferation threats posed by North Korea and Iran....the picture is bleak.

Our constitutional order is becoming markedly less competitive--making government less responsive and leaving critical sectors of our society less dynamic and free. To understand the sources of this trend and its importance, we need first to understand the nature, advantages, and challenges of competition itself.

Slow and steady increases in the retirement age and minor tweaks in benefit formulas can no longer stave off disaster: Reformers must now entertain policy solutions once considered unimaginable. And prominent among those solutions is subjecting Social Security and Medicare to some form of means-testing, by which poorer seniors would receive more generous benefits and the wealthy would receive less (or none at all).

All children in a free nation have a moral claim to attend schools that will help them discover and develop their gifts. And while difficult choices must always be made, we should be wary of shaping schools in ways that explicitly favor some of our children while shortchanging others.

Over the past few decades, our economy has undergone some fundamental changes--with the result that the fight for control over the commanding heights of American economic life is still very much with us. And it is a fight that, at least for now, the free-market camp appears to be losing.

Despite this election's high stakes, however, the question of which candidate will bear the GOP's standard remains shadowed in great uncertainty, owing mostly to the lack of an obvious frontrunner. Given these unusual circumstances heading into 2012, what kind of nominee should we expect? And what kind of nominee should Republicans want?

The best reason for using force in Libya is to secure the removal of Gadhafi. But since this is not why our president ordered U.S. forces into action, Congress should discuss whether committing our young service members, at the risk of life and limb, for purely "humanitarian" reasons, is legitimate national policy.