The new magic number: 28. That’s how many rules panel members anti-Trump forces will need to force a vote on unbinding delegates on the floor of the Republican convention. Donald Trump has already far-surpassed the 1,237 delegates needed to clinch the GOP nomination. But a last-ditch effort to change the rules and let delegates vote their consciences faces a steep uphill climb in Cleveland. The goal? Take a vote on unbinding the delegates on the convention floor. Here’s what would need to happen -- and how likely it is: The Process The slate of temporary rules must first clear the RNC’s standing rules panel and full RNC next Tuesday and Wednesday.