Americans are casting ballots in midterm elections that could prove pivotal in defining the closing chapter of Donald Trump's political career and reshape the landscape of American politics.

These elections arrive at a challenging juncture for the Republican Party, with voters citing the cost of living as their primary concern. Soaring food and fuel prices, influenced by factors including tariffs and international conflicts, are at the forefront of many voters' minds.

Trump, whose approval ratings have seen a notable decline, has actively campaigned at numerous rallies nationwide. He has focused on traditionally Republican strongholds, undertaking a final campaign push in states like Iowa and Kansas. His party has also invested heavily in advertising for these contests, a strategy that suggests a defensive posture, according to political analysts.

"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, managing editor of the Cook Political Report, told the BBC, noting the unexpected level of spending in states like Kansas.

At his rallies, Trump has urged voters to consider him as if he were on the ballot, a plea that highlights a crucial question: his continued electoral influence. While he is not a candidate, his impact on the Republican Party's performance is under scrutiny.

Following his 2024 election victory, Trump was a dominant force with strong approval ratings. In the previous midterm elections in 2022, his endorsement was seen as critical for Republican success. However, persistent economic concerns and international conflicts have impacted his standing.