In an election cycle full of dramatic twists and turns, the first presidential debate will be a game changer for Donald Trump. With the election in the margin of error both nationally and in battleground state polling, Trump’s performance will either create a bigger wave of support or disqualify him in the minds of voters.

While Donald Trump is a known entity to voters as a businessman and reality television star, many are still deciding whether he has the temperament and capacity to serve as commander in chief. Just like the Republican primary debates, the first presidential debate is expected to shatter records with an estimated audience of over 100 million people. That means Trump will receive invaluable free advertising after getting heavily outspent by Hillary Clinton for months on radio and television.