I don't think that's a policy that would get majoritarian support in the US. The only people who can and should get deported are those who are not already not authorized to be here. If you don't deport them, it's functionally equivalent to an open-borders policy. Do you want more MAGA? Because open-borders is how you get more MAGA.
What you're proposing is also roughly analogous to a policy of not evicting squatters. If someone breaks into your house and decides to start living in one of your bedrooms, are you going to want them out or give them a key? The squatter is a person too, not a mold outgrowth that needs culling.