Not at all. While Trump is a joke of a human being, he is leading the republican nomination, and baring any big surprises will be the republican’s presidential hopeful, and he will keep the support of the majority of republicans. Meaning that just about half the country is guaranteed to vote for him.
The headline explains that based on polling data and/or magic, both Bernie and Hillary would win against him. That is newsworthy as so far I think Hillary was seen as the only guaranteed choice to take Trump down.