Biden stokes fear of Trump after easily winning the first Democratic primary. Biden had 96.3% of the ballots, compared to 2% for self-help and parapsychology guru Marianne Williamson and 1.5% for Congressman Dean Phillips.
It is very unusual for a sitting president to face other serious candidates in a primary. When that happens - as happened to Gerald Ford in 1976, Jimmy Carter in 1980 and George Bush'sr.' in 1992 - he usually loses elections.