The Democrats, especially Left leaning activists judges, would easily make attacking a Republican legal. In fact, they are strongly moving that direction for a decade now. Using Antifa and the MAGA hat defense as an example, more and more Leftists judges are ruling that Liberals are innocent of violence against Republicans because the Liberals were "triggered", whatever that means, by something the Republican said or did.
Once a Liberal is so called 'triggered' they are no longer held responsible for their actions because, as the argument goes, they couldn't help it. Liberal violence is the Republican's fault for daring to disagree with them. The 'triggered' defense does not apply to Republicans or Trump supporters because they are inherently 'evil' with 'wrong think' and therefore cannot be triggered by anything the Left says or does. Liberals are portrayed as innocent little lambs fighting their definition of fascism, which in their world is any opinion or thought that disagrees with anything they believe.
There is no objective law enforcement in America anymore. So many judges have abrogated their duty to dispense 'blind justice' for politics instead. American Law enforcement has evolved into almost pure politics, and has very little to do with the four corners of what the 'Law' actually says. Until more judges start overturning whimsical and illegal rulings like this, eventually Democrats and Leftists will essentially be totally immune from law enforcement involving violence or violent harassment.