<p>In the wake of debate rules changes announced Tuesday, the Republican National Committee convened a conference call Wednesday morning to brief campaigns on logistics and the effect of the new debate criteria.</p><p>The call, designed to prevent grumbling from the GOP presidential campaigns and answer questions about the upcoming debate, came less than a day after another conference call – convened by CNN – announced rules changes that opened the door for Carly Fiorina to appear in the Sept.