If this is true, we should be concerned.
Concerned is not the word I would use.
I have no problem with the DOJ re-opening a corruption case on Biden for what looks to be some pretty fishy circumstances. The president using FP and the power of the office to do it through his personal lawyer? That is a very different matter. That is a clear abuse of power being used against political opponents.
What is rather ironic is this is exactly what he has been bitching about this entire time - Obama using the FBI to take out Trump. Something that has been shown to be false. Pretty much everything the democrats have been doing to 'investigate' Trump has been bullshit fishing and faux outrage over silly shit. This is something that I would think should be an easy impeachment case if shown to be factual.
The political system cannot work if the president is using the power of his office to take out political opponents.