I have the video right here. Biden does appear to stutter and unable to proper speak his words.
Trump without a doubt stuttered here. Again, I have had a speech impediment my entire life and know lots of people who do, and he is indeed mocking his speech impediment.
Again, attempting to take actions out of their context, as an argument, does not work.
Biden has been open about his struggles with his stutter, working for years reciting Shakespeare into the mirror to study his facial movements. He donates his time to organizations dedicated to helping people overcome their stutters. He talks about it on TV and works to raise awareness.
And the President mocked him about it.
Flip that around, and it’s not the same situation.
Donald Trump has never had anything to “overcome” in his life. He’s never believed he was anything less than perfect, and has never worked to improve himself.