Trump has attacked so-called “corporate inversions,” in which companies claim U.S. operations are owned by subsidiaries abroad, to move profits to jurisdictions with lower tax rates. Jeb has said he would end subsidies for oil and other energy companies.

Trump has not rolled out a tax plan, but he has vowed to raise taxes on “hedge fund guys.” Jeb Bush’s tax plan, meanwhile, nixes the loophole in which hedge fund managers pay a lower tax rate on “carried interest,” i.e., profits on investments. Still, Jeb’s plan would result in a huge overall windfall for the wealthy, meaning it isn’t “populist” in any real sense. And so, remarkably enough, Trump (given what we know so far) might end up going farther than all of his GOP rivals in vowing to tax the rich.

Indeed, Trump is the one who will probably end up serving as the most useful wedge for Democrats to try to drive among Republicans.

It might seem unlikely that Republicans will agree to end those tax breaks. However, the argument from Democrats that Republicans should follow Trump’s lead is more than just a one-off political stunt. (Schumer has previously supported ending the carried interest loophole.) It’s designed to support an argument that they hope will resonate throughout this budget fight and into the 2016 elections.