 WTOP's Mitchell Miller has details. President Biden's decision means he will no longer be the nominee at the Democratic National Convention that begins less than a month from now on August 19th. Vice President Kamala Harris will need to solidify her position as Biden's choice with the nearly 4,000 delegates since it will technically be an open convention. It's possible she could be challenged by another candidate, but many Democrats are wary of what would be the first contested convention in decades.