

Pretty much zero.
The Dems would need to have an actual platform other than orange man and couch fucker bad. They keep running on feelings and vibes without a concrete plan to improve things. Not that they will be able to accomplish anything of value, given the circumstances, which will not help in 2028. Then there is the 3rd parties that could form that really makes things worse.
Without a serious effort by the Dems, we are almost certainly going to have another 4 years of Republican Whitehouse in 2028 and the best hope is a slight majority in Congress.

According to the admin, 1.6m people have self deported or been deported. They also said they arrested more than 352,000 and deported more than 324,000. Not sure if the 324k is from the 352k, I think the 324k is included in the 1.6m.
200 days, 1.6m deported. 8,000 per day average. 2.92m per year, 11.68m over 4 years. 11m is the conservative estimate number of unlawful immigrants, Pew says 14m, but the upper estimate is over 21m.
So they claim they have hit 1m a year a while ago, but we would have to trust their numbers are accurate. There are indications that at least 600,000 have left the US, but that is pretty much based on vibes because concrete numbers are impossible to obtain.