"Tuesday's Contests Could Determine Biden and Trump Nominations for General Election"

Joe Biden and Donald Trump are expected to secure their parties' presidential nominations in Tuesday's primaries, setting the stage for a general election rematch. Both candidates face minimal opposition and are close to reaching the necessary delegates to become their parties' presumptive nominees. Trump acknowledged Biden as the Democratic nominee and launched a new attack on his age, while Biden focused on Trump as a serious threat to democracy. Both candidates are dealing with challenges, with Trump facing legal issues and questions about his policies, and Biden working to assure voters of his physical and mental capabilities. The primaries in Georgia, Mississippi, Washington state, and Hawaii will play a crucial role in solidifying the nominees.