 This is now a major campaign reset, to say the least, with just over 100 days to go until the November election. It's a curveball the Trump campaign was preparing for, but this is not one that they wanted. And Trump's playbook so far has been to attack, attack, attack. The former president who just days ago said he wanted to focus on this message of unity, now calling President Biden the worst president in American history, insisting whoever the left puts up will be more of the same. As for Harris's running mate, here's former New Jersey governor and ABC News consultant Chris Christie.