By Jason Lange WASHINGTON (Reuters) – Here’s some advice for anyone following Tuesday’s U.S. midterm elections: Be ready for a long night and maybe days of waiting before it’s clear whether Republicans or President Joe Biden’s Democrats will control Congress. All 435 seats in the U.S. House of Representatives are up for grabs, as are 35 U.S. Senate seats and 36 governorships. Republicans would need to pick up five seats to take a majority in the House and just one to control the Senate. Nonpartisan election forecasters and polls suggest Republicans have a very strong chance of winning a House …