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Midterm elections live updates: 1 week until high-stakes elections

Trump is heading to Texas for the fourth time since Labor Day to campaign.

There is just one week until the high-stakes midterm elections on Tuesday, Nov. 3.

There are several key House and Senate races that could determine the balance of power in Congress as well as significant races for governor around the country. The elections could ultimately determine how effective President Donald Trump's agenda is in the back half of his second term.

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These key Senate races will determine which party controls the body next year

Thirty-five Senate seats are up for grabs when Americans head to the polls on Nov. 3. A key handful of them will be critical in determining whether Democrats or Republicans control the chamber next year.

As both parties prepare for the final leg of the campaign, there are closely watched Senate races in Michigan, Texas, Alaska and several other states.

Read more about the match-ups.

-ABC News' Allison Pecorin

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