text:  From ABC News, I'm Sherry Preston. The morning after the first presidential debate of the 2024 presidential campaign, and a lot of Democrats are waking up worried. President Biden clashed over issues like abortion, immigration, and the economy with former President Donald Trump. But Biden's voice appeared shaky and raspy, and he seemed to lose his train of thought while answering a question about tax cuts. Here's ABC News Chief White House Correspondent Mary Bruce.