Trump Threat to Close Southern Border 'Unwise,' Napolitano Says

The video discusses key national security issues in the US, focusing on border security, the potential impact of President Trump's threat to close the border, and the legal and economic implications. It also covers the reduced risk of 911-style attacks, the growing threat of cybersecurity, and the impact of climate change. The discussion includes concerns about Russian interference in US elections and the polarized debate on climate change.

How does the text describe the impact of climate change on national security?

What concerns are raised about foreign interference in US elections?

What does the text suggest about the American public's understanding of climate change?