Generally speaking, a caucus is a club or meeting of like-minded people. In the context of presidential politics, a caucus is a gathering of Republicans or Democrats for the purpose of stating a preference for their party’s presidential nomination. In Iowa, a caucus is held in each precinct, which means 1,774 meetings around the state. Republicans and Democrats caucus differently. Because the Republican caucuses are highly competitive this time around, while the Democratic ones aren’t – we predict President Obama will win – we’ll discuss just the Republicans.