From Simon Jenkins in today's Guardian:

...Most observers had reached the view that Trump the politician was over the hill. His rallies were tired and his speeches meandering. New Republican hopefuls for 2024 were on the horizon, notably Florida’s Ron DeSantis and former vice-president Mike Pence, both of whom have publicly criticised Trump for refusing to concede the 2020 election. Continued reports of his many misdemeanours would surely lead Republicans to accept his days were over.

Legal analysis of this week’s case against Trump suggests there are serious obstacles in the way of his ending up in prison. A law professor and former prosecutor, Jeffrey Bellin, has pointed out that falsifying accounts can have numerous mitigating factors. Any judge and jury, even in New York, will be aware of the political perils of jailing an ex-president, not least for crimes ostensibly less awful than those for which President Nixon was excused. Were Trump to be on trial for interfering in the Georgia poll or inciting a riotous assault on the Capitol, it might be different. But Republicans find it hard to disagree with Trump’s claim that the New York case is a witch-hunt that amounts to “political persecution and electoral interference”.

Meanwhile, Trump’s team have treated the indictment as the best adrenaline boost a populist could ask for. It has given them a platform, an enemy and a cause...

Unless he's found guilty, and unless the ensuing sentence is outrageously harsh (very unlikely), this will strengthen him. I can also see the risk of charging him with either of the other two offences mentioned, as it could be hard to make 'em stick, but this one seems even riskier to me.