The most important moment in the race between Kamala Harris and Donald Trump comes this week, as the vice president prepares for what could be her only opportunity to directly confront a former president whose political dominance she is pledging to end.

Just days ahead of the first — and perhaps only — debate between Vice President Kamala Harris and former President Donald Trump, polls show an extremely close race. As such, this debate is likely each candidate’s last best chance to turn the tides in their favor.