MY first thought on the running mate question is that to balance his ticket, Barack Obama should pick a really old white general. Therefore, he should pick Dwight Eisenhower. John McCain, on the other hand, needs to pick someone younger than himself. Therefore, he also should pick Dwight Eisenhower. My second thought is that most of the commentary on vice president picks is completely backward. Most discussion focuses on what state or constituency this or that running mate could help carry in the fall. But, as a rule, recent vice presidential nominees haven't had any effect on key states or constituencies. They haven't had much effect on elections at all, except occasionally as hapless distractions. A vice president can, however, have a gigantic impact on an administration once in office (see: Cheney, Richard). Therefore, a sensible presidential candidate shouldn't be selecting a mate on the basis of who can help him get elected. He should be thinking about who can help him govern successfully so he can get re-elected. That means asking: What circumstances will I face when I take office? What tasks will I need my chief subordinate to perform to help me face those circumstances? If Barack Obama is elected, his chief challenge will be that he hopes to usher in a new style of politics, but he has no real strategy for how to do that. He will find himself surrounded by highly partisan Democratic politicians, committee chairmen and interest groups thrilled to finally seize power. Some of them might have enjoyed his lofty rhetoric about change, but in practice, these organization types have no interest in changing politics. They just want to take the money and patronage that has been going to Republican special interests and give it to Democratic special interests. These entrenched Democrats are more experienced than Obama. They know how to play the game better. The effect of their efforts will be to turn his into a Potemkin administration filled with great speeches but without great accomplishments or influence over legislation. Obama will need a vice president who knows the millions of ways that power is exercised and subverted in Washington. He'll need someone who can be a senior, authoritative presence in a cabinet that may range from Republican Senator Chuck Hagel to the labor leader Andy Stern. He'll need someone who can supervise his young reformers and build transpartisan coalitions more effectively than Obama has as senator. Sam Nunn and Tom Daschle seem to fit the bill. Nunn is one of those senior Democrats (like David Boren and Bob Kerrey) who left the Senate lamenting the dumbed-down nature of modern politics. Daschle was more partisan as majority leader, but he is still widely trusted and universally liked. As experienced legislators, both could take Obama's lofty hopes and translate them into nitty-gritty action. If John McCain is elected, he'll face a political culture threatening to split at the seams. In defeat, Democrats will be enraged at everything and everybody. The Republican Party will still be exhausted and divided. McCain will find it hard to staff the administration since so many Republican advisers were exhausted over the previous eight years. Amid these centrifugal forces, McCain will need somebody who radiates calm. He'll need somebody who can provide structure and organization. He'll need somebody who enjoys working with budgets. With the Democrats controlling Congress, McCain will have no chance of winning big, ideological fights. He will need someone who can help him de-ideologize the climate, who can emphasize making things work rather than fighting philosophical battles. McCain seems to be looking at business leaders like Meg Whitman. But among politicos, the shining stars would seem to be Rob Portman and Tim Pawlenty. Portman is an Ohioan with the mind of a budget director and a mild temperament that is a credit to his Midwestern roots. His résumé is ideal: He directed legislative affairs for the first President Bush, served in Congress for more than a decade and managed the Office of Management and Budget under Bush the younger. He excelled in every role. Pawlenty, the governor of Minnesota, is one of the G.O.P.'s leading and most likable modernizers. The son of a truck driver (his mother died when he was 16), he is the godfather of Sam's Club conservatism, the effort to reconnect the party to the needs of the working class. Pawlenty could help McCain play the Theodore Roosevelt-style role — reforming the nation's institutions to fit a new century and epoch. Both presidential candidates are surrounded by campaign advisers, campaign coverage and campaign frenzy. But the vice presidential pick is not really a campaign decision. It's the first governing decision — and a way to see who is thinking seriously about how to succeed in the White House. – The New York Times __