In six months, American voters will go to the polls for the so-called midterm elections. The entire House of Representatives and a third of the Senate will be elected. This said, the most important politician influencing the outcome of those elections will not be on the ballot: Joe Biden. The Midterm ElectionsMidterm elections take place two years after the presidential election and it is in the nature of the American checks and balances that the party of the incumbent president usually loses seats. In fact, the approval rating of the incumbent president is one of the best predictors for the o…