"Man without a party"

I found it interesting when Mara Liasson mentioned, "He's a man without a party,” when referring to Trump in an NPR podcast released on Thursday. Trump acted in opposition of Republican congressional leaders this week when he signed on the debt ceiling. In the past, Trump has been unpredictable, so his decision comes as no surprise. I wanted to hear your perspectives to help answer some questions I have. 1) How do you think Trump's actions this week will shape future negotiations across parties? 2) Does Trump need the support of the GOP?

Thanks!