 The first presidential debate did see a number of topics discussed that are important to voters, with plenty of discussion on the issue of illegal immigration. In fact, even if candidates were discussing a different topic, Donald Trump would often turn the conversation to immigration, claiming that Biden was responsible for an open border and migrant crime in the United States. President Biden did manage to attack Trump, though. He asked him, how many billions do you owe for molesting a woman in public, for having sex with a porn star while your wife was pregnant?