Under some circumstances I might be sympathetic to the argument that handing both Congress and the presidency to the same party is a bad idea. After all, our system of government is based on the principle of checks and balances, and one-party rule can lead to corruption and abuse of power in short order.

But look at it this way: if you think that Barack Obama’s stated policies are superior to John McCain’s, then you’re going to want a Congress that will enact those policies. And if you think the positions of congressional Democrats are better than those of Republicans, you don’t want a president who will veto them. Republicans understandably want to hold onto as many seats in Congress as they can, but if you favor liberal policies, then having more Democrats in Congress and a Democrat in the White House is a good thing. It’s not that complicated.