I really wish people would stop saying that Bernie or his supporters are, "making [Clinton] a better candidate." She's not improving; she's just saying whatever is necessary to get people to vote for her. Notice how she doesn't talk about Flint, MI anymore? She doesn't try to pander as much anymore; now she just copycats. A few days ago she got in front of the cameras and said we have to get big money out of politics and overturn Citizen's United -- the law that’s enabled her to campaign with Super PACs.
She's not 'improving'; she's copying. Stop believing that anyone's making her a better candidate. If she manages to get nominated, we'll watch her revert back to her natural self in order to try to appeal to republican voters..