It's also no secret that Jeb Bush is far more "moderate" when it comes to finding solutions for the "illegals" problem in the US than many in his party are. You see, people like Jeb Bush and his brother, who have been Governors of States like Florida and Texas, have a keen understanding of the illegals issues in their states. GW tried unsuccessfully to find a solution when President and I'm sure Jeb will also try to find a solution when he's President.
It's a very contentious issue and anyone who attempts to address it is going to uncover new enemies regardless of what side he/she takes. But it's an issue that's not going to solve itself.