His strategy was simple. With Democrats controlling Congress, Mr. Limbaugh saw that there was no way to stop the president’s agenda. He dismissed the moderates’ notion that compromising with the president would make Republicans look good to independents. Instead he decreed that the Republicans must become the party of no, and force Democratic candidates — especially centrists — to go into 2010 with sole responsibility for the Obama program and the state of the economy. And that is what has happened…

When the Tea Party movement emerged, Mr. Limbaugh welcomed it. The movement’s causes — fighting against health care reform, reducing the size and cost of government, opposing the Democrats’ putative desire to remake America in the image of European social democracies — were straight Limbaughism. A very high proportion of the Tea Partiers listen to Mr. Limbaugh. Sarah Palin’s biggest current applause line — Republicans are not just the party of no, but the party of hell no — came courtesy of Mr. Limbaugh. (Ms. Palin gave the keynote address at the first national Tea Party convention.) Glenn Beck, who is especially popular among Tea Partiers, calls Mr. Limbaugh his hero.

So why the lack of attention? Mr. Limbaugh has studiously refrained from claiming credit for the movement. His only intervention thus far has been to quash talk about the Tea Party becoming a third party. He wants a unified, right-wing G.O.P. in 2010, and by all appearances he is going to get it.