Americans vote today to choose their Congress. The US President isn't on the ballot, but the result will shape how freely he can pass laws for the rest of his term. Why should an Indian investor care? Because US interest rates, the dollar and trade policy affect our markets too. Here is a simple look at how. The election in brief • All 435 House seats and 35 of the 100 Senate seats are being voted on. • Republicans control both houses now. Polls and forecasters give Democrats