KANSAS CITY, Mo. (AP) — The clamor for change that’s fueling Donald Trump’s presidential campaign may help a little-known Democrat upset a powerful Republican senator in red-state Missouri on Election Day.

And with just a few competitive Senate races around the country, the outcome in Missouri could help determine which party controls the Senate.

The contest between the Democratic challenger — Missouri Secretary of State Jason Kander — and GOP Sen. Roy Blunt, didn’t start out high on either party’s list of competitive races in a state Trump’s likely to win.

But now Missouri is now in a group of Republican-friendly states — along with North Carolina and Indiana — that have emerged as battlegrounds as Democrats try to gain a majority in the Senate.