Following a high-stakes campaign stop outside Dayton, Ohio, U.S. President Donald Trump struck a combative tone on Saturday, brushing aside mounting voter concerns and urging supporters to rally behind the state's vulnerable Republican ticket ahead of the looming congressional elections.

Trump told a rally in Vandalia, Ohio, that he believes there will be a “big surprise” in the upcoming elections, claiming his Democratic opponents do not know what is happening.

Trump struck a defiant tone during a campaign stop outside Dayton.

Polls have suggested that Democrats could gain........

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