It's Election Day: Here's what you need to know before polls close

The polls have opened as voters decide who will control the 120th Congress. All 435 House seats are up for grabs, and 35 out of the 100 Senate seats are open.
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The polls have opened as voters decide who will control the 120th Congress. All 435 House seats are up for grabs, and 35 out of the 100 Senate seats are open.