They will do anything to prevent Trump from running again. From Boyd D. Cathey at unz.com:

Much of the media has been obsessed recently about a putative legal action which may be brought by New York DA, Alvin Bragg, against President Donald Trump. The possible decision by a convened grand jury would be an outrageous and politically-motivated perversion of the American justice system. In a real and horrifying sense, it would represent a culmination of the movement in our collective history when the legal and court apparatus of the nation has been suborned ideologically and made a weaponized arm of one political party—the party now in power—to suppress, proscribe, and eventually imprison the titular leader of the other political party and his supporters
In short, it would represent the replication of one of the worst and most onerous characteristics of the former Communist regimes in Eastern Europe. It would be, effectively, the end of the constitutionally-prescribed separation of powers that has served as a major component in our “regime of liberty,” so carefully—and tenuously—established by the Framers.
“A republic, if you can keep it,” Ben Franklin supposedly said of the new American federation, a federation in which executive, judicial, and representative powers were balanced, and liberty thus safeguarded. In recent times, overreach by the Executive and its insidious and increasing control of the Judiciary, while the Representative branch seems largely asleep-at-the-switch (or often cooperating) has meant the severe and ineluctable decline in that fragile balance.
The object of this usurpation and overturning of nearly all constitutional safeguards has been President Donald J. Trump: to prevent him at all costs from coming back into office as president, including engineering the final destruction of what remains of the old American republic to stop him. Trump’s election in 2016 and the fact that, unlike all other previous presidents for the last century, he was not part of the Washington DC Deep State “swamp,” that he was unpredictable, and that he essentially could not be bought off (after all he was already a millionaire many times over and did not need the money), meant that the elites of the Managerial State—to use James Burnham’s terminology—felt profoundly threatened.