6 AM ET: Harris' DNC promises, Trump's rebuttal, rail shutdown ended & more

<p>Vice President Kamala Harris capped off the DNC last night with a speech to rally Democrats. After, former President Donald Trump shared his thoughts about his presidential rival, while sources say RFK Jr. may endorse Trump today. The Supreme Court is blocking some of Arizona’s proof-of-citizenship requirements for this November’s election, but is allowing some other controversial requirements. The Canadian government has stepped in to end a rail shutdown that threatened to disrupt its economy and that of the US. Plus, coming in second isn't so bad for a diamond.</p><p> </p><p>Learn more about your...