The presidential election has taken up most of the public’s attention, but it is not the only interesting political battle this cycle. While the House of Representatives will likely remain in Republican hands, the Senate is up for grabs. The outlook at this point is roughly 50-50 for either party to take control. Here’s how the math breaks down.

The public will elect 34 senators this cycle. These are the seats being contested. Here’s a handy map from 270towin.com visualizing it:

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