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President Trump's political operation has begun deploying its roughly $403 million war chest for the 2026 midterm elections, with Trump-aligned groups now pouring money into increasingly crowded and costly advertising markets. Democratic Senate candidates had entered the summer with a cash advantage, setting up an intensifying spending battle heading into November. The ramp-up in spending signals the start of a more active phase of the midterm campaign, with both parties expected to escalate advertising in competitive races as election day approaches.