On today's episode of Politics Nation, the Reverend Al Sharpton touches base as we hurtle towards day 100 of Trump 2.0. We're also starting another week and another round of judicial combat between the Trump administration and our courts.

Right now, the President's attempts to deport Venezuelans have been halted by the Supreme Court as justices consider that case.

Plus, while the white house continues to justify the mistaken deportation of a Maryland man -- and its refusal of a Supreme Court order to retrieve him,

The case of Kilmar Abrego Garcia has become a rallying cry for activists and some Democratic lawmakers, who see it as the shot in the arm the party needs right now.

Also, this week is the first Earth Day of Trump's second term. As he doubles down on harvesting fossil fuels and the exploitation of our oceans, and continues to defund federal research, scientists warn of another potentially record-breaking summer heat cycle. And who pays most of the price? We'll tell you in just a bit, as we've got another "Politics Nation" summit to tackle the trump effect on our habitats and health.