Vice President Kamala Harris shakes former President Donald Trump's hand at their first presidential debate.
Alex Brandon
- Kamala Harris and Donald Trump are debating for the first — and maybe only — time in Philadelphia.
- It's the highest-stakes moment of the presidential campaign yet.
- Here are the biggest takeaways from the debate so far.
Vice President Kamala Harris and former President Donald Trump met for their first debate on Tuesday night.
The high-stakes face-off...