This CNN article provides a roundup of five key news stories for June 7th. Firstly, it covers the latest developments in the 2024 US presidential race, with updates on candidates and their campaigns. Secondly, it discusses the ongoing legal case involving Hunter Biden, the son of President Joe Biden. Thirdly, it highlights the extreme heat wave affecting parts of the United States and the associated risks and precautions. Fourthly, it provides an update on the situation in Ukraine, including the latest on the conflict with Russia. Finally, it reports on the issue of cargo ships waiting to unload at ports in the United States, which is causing supply chain disruptions.