"Law and Order" doesn't mean its literal definition to Republicans. It means "one standard for us, another for everyone else." Trump encompasses that better than anyone.
To be fair, that's no different for liberals. Each side advocates a more merciful approach for their own.
To be accurate, you have exactly zero empirical evidence for that.
You are implied that there is an ideological basis to Democratic pardons, as in supporting one's base. Was there stinking cronyism in Clinton's pardon process, sure. But ideology? The closest there is a pardon of weatherman 25 years after their crimes. Unlike D'Nish D'Souza, scooter Libby, and Joe again, there wasn't a host of the political base wanting "their team to beat the rap.