Hunter Biden is finding himself in increasing legal jeopardy as his lawyers try to salvage his foundering plea deal, GOP lawmakers escalate their probes, and the Department of Justice pursues its own ongoing investigation. So, should Mr. Biden’s plea deal fall through or his past business practices bring new charges, how much time could the first son face behind bars were he charged and convicted?

The most straightforward issue for Mr. Biden is that of his forthcoming guilty plea, where he hopes to admit to two misdemeanor charges of “willful” tax evasion in exchange for probation.