Reported by BBC World
With two years of his presidency remaining, Donald Trump, who has dominated American politics over the past decade and transformed it in remarkable ways, is facing potentially pivotal elections.
And the midterm elections on Tuesday that will decide control of Congress come at a difficult moment for his Republican Party.
Voters overwhelmingly say they are most concerned about the cost of living. Food and fuel prices have soared in part due to the president's aggressive tariffs and unpopular war with Iran, so it will be top of mind as many head to the polls.
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Trump, who has faced record low approval ratings in recent months, has been campaigning hard, headlining dozens of rallies across the country.
But high prices are a concern for voters on all sides - which helps explain why he has been campaigning in previously safe Republican territory, appearing in Iowa and Kansas during a final weekend blitz.
His party has also poured hundreds of millions of dollars of campaign advertising into these traditionally safe contests, such as the Senate race in Kansas.
"When they start spending hard American dollars on political advertising in a state that they should be winning, that's how you know that they think they're in trouble," Carrie Dann, the managing editor of the Cook Political Report, which analyses campaigns and elections, told the BBC.
"The spending [in Kansas] is going to be far more than Republicans ever anticipated," she added. That points to a party that is approaching these elections on the defensive.
Trump held a rally in Kansas, a traditionally safe Republican state, on Sunday as polls suggest the Senate race may be in play for Democrats
At many of his rallies, Trump has also made a plea to voters. "In this election, I'm asking you to pretend, please, that I'm on the ballot," he said last month. "Just pretend."
Of course, he is not on the ballot. But this plea - which he made again in Iowa on Sunday - gets to the heart of a critical question: Is he still an electoral asset for his Republican Party?
Trump returned…