With 21 seats up for the Republicans the Democrats have a very reasonable shot at achieving a super majority in the Senate just on those numbers alone. If the Democrats are more competent than the Republicans that could mean a whole raft of laws passed through very quickly.
Besides, if Trump doesn't get reelected and no Republican takes the presidency? You can bet that the various state prosecutions file suits the day after election day, to be unsealed and prosecuted the moment Trump's no longer in office. And not just for Trump, his entire family and most of the upper levels of his administration will be brought in either to testify or as suspects. And the Democrats would support this because it helps them politically to become the party of law and order and to use the Trump administration as the case study for why the Republicans aren't.
Besides, if Trump doesn't get reelected and no Republican takes the presidency? You can bet that the various state prosecutions file suits the day after election day, to be unsealed and prosecuted the moment Trump's no longer in office. And not just for Trump, his entire family and most of the upper levels of his administration will be brought in either to testify or as suspects. And the Democrats would support this because it helps them politically to become the party of law and order and to use the Trump administration as the case study for why the Republicans aren't.