Here's your summary from Trump triples down on 'cognitive, drug test' before debate with Biden (https://www.youtube.com/watch?v=DHhBx-mBmmk) on the Fox News channel:

**TLDR:** Trump makes campaign promises in Las Vegas, leads in Nevada polls, challenges Biden to cognitive and drug tests before debate.

**Key Points:**

1. Trump promises to eliminate taxes on tips for service workers in Las Vegas, leading in Nevada polls.

2. Trump challenges Biden to take cognitive and drug tests before the upcoming debate.

3. Discussion on potential VP candidates for Trump's re-election campaign.

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