This week on Face the Nation, excessive heat blankets the country as we begin a crucial week on the 2024 campaign trail. Donald Trump was on the campaign trail in Philadelphia Saturday, while President Biden is off the trail preparing for Thursday's debate at the Camp David presidential retreat. CBS News Elections and Surveys Director Anthony Salvanto discusses his latest poll on young voters. Next, New Mexico Governor Michelle Lujan-Grisham joins us as her state deals with ravaging wildfires and floods declaring a state of emergency. Plus, we ask former National Security Advisor Robert O’Brien what a second Trump presidency foreign policy would look like. And finally, CBS News National Security Contributor Michael Morrell gives us the latest on the terrorism threats. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.