Why do foreign leaders address Congress?

The video discusses the significance of foreign leaders addressing the US Congress, highlighting that it is a rare honor typically reserved for nations with close ties to the US. Israeli Prime Minister Benjamin Netanyahu is set to address Congress for the fourth time, a record for any foreign dignitary. His speech comes amid the ongoing Israel-Hamas conflict, and it may influence future US support. The video emphasizes the importance of Netanyahu striking a tone of unity to maintain US backing.

Why might Congress not invite leaders like Xi Jinping or Vladimir Putin to give a joint address?

What tone does Netanyahu need to strike to continue receiving support from the United States?