A barrage of state and federal criminal charges leveled against your main political rival should be good news for any democratic leader facing re-election, but Donald Trump's legal woes present a unique challenge for U.S. President Joe Biden in the months ahead, political strategists say.

Biden has so far remained mum as his Republican predecessor has been charged with 91 felony counts in four indictments this year related to paying hush money to a porn star, unlawfully keeping classified documents and attempting to overturn the 2020 election. Don't expect any change, Biden advisers say, until after decisions are handed down in those trials.

However, sustaining that strategy during the most contentious and consequential judicial actions in U.S. presidential history will be severely tested in the coming months, political strategists say.