It is an old liberal theme that conservative ideas, being red in tooth and claw, cannot possibly emerge from any notion of the public good.

So a Holocaust-denying, virulently anti-Semitic, aspiring genocidist, on the verge of acquiring weapons of the apocalypse, believes that the end is not only near but nearer than the next American presidential election. (Pity the Democrats. They cannot catch a break.) This kind of man would have, to put it gently, less inhibition about starting Armageddon than a normal person.

Pass legislation. When Obama signs, you've shown seriousness and the ability to govern. When he vetoes, you've clarified the differences between party philosophies and prepared the ground for 2016.

Truman left in the middle of an unpopular war, a war of choice. Truman didn't have to go into South Korea. And he was reviled and ridiculed for the stalemate that resulted. Now, he's seen as one of the great presidents of the 20th century.

Post-Watergate morality, by which anything left private is taken as presumptive evidence of wrongdoing.

Winning control of the Senate would allow Republicans to pass a whole range of measures now being held up by Reid, often at the behest of the White House. Make it a major reform agenda. The centerpiece might be tax reform, both corporate and individual. It is needed, popular and doable. Then go for the low-hanging fruit enjoying wide bipartisan support, such as the Keystone XL pipeline and natural gas exports, most especially to Eastern Europe. One could then add border security, energy deregulation and health-care reform that repeals the more onerous Obamacare mandates.

Identity politics is the mother's milk of the Democratic Left.