candidates want. the rules were established and they lost control over the entire process last time. >> i know that harry truman couldn't get elected president with explaining the united states of america's health care plan in 30 seconds. >> reporter: while those competing for more conservative voters want to see different moderators. >> if you have never voted in a republican primary in your life, you don't get to moderate a republican primary debate. >> reporter: and some are already sick of the grumbling saying they think the debate format is just fine. >> we're here in iowa talking to voters instead of being in d.c. talking about debates. we've had no trouble negotiating with the networks. and my policy remains what it's always been, i'll debate anyone, any time, anywhere. >> stop complaining. you know, do me a favor. set up a stage, put podiums up there and let's just go. >> now, just when you thought all the campaigns were going to get together present a united front and come up with these debate negotiations, donald trump has pulled out a trump