Watch Ian Bremmer explain the "Top Risk" of 2021: divided US domestic politics

Today, GZERO Media's parent company, Eurasia Group, released its annual report on the top 10 geopolitical risks that will shape the year.

In a GZERO Live discussion, Ian Bremmer explained why US domestic politics were named the "top risk" for the second consecutive year, as we enter an era when every Oval Office occupant is seen as illegitimate by roughly half the country — including lawmakers that election skeptics send to Congress.

Willis Sparks explains the implications to US foreign policy when Republicans and Democrats disagree so sharply, as allies and potential partners are left to wonder whether the next "America First" president and foreign policy are just four years away.

Watch the full GZERO Live discussion here.