“Another point: why is Cruz asking for a one-on-debate? There are several other candidates running for the GOP nomination. Did he think about them? Would it be fair for Trump to only debate Cruz?”
Trump had little “debate” experience before the Republican debates, and thus far there have been so many on stage that exposure has been very limited. Going one-on-one would be very good practice if nothing else - whether you are for or against him. Dropping out of the debates will leave him unprepared for the give and take repeatedly for two hours that will occur this fall. Very foolish move, in my opinion. Yes, other candidates should still be involved at this point, but Trump was the one who pulled out of debating against a full panel.
“Dropping out of the debates will leave him unprepared for the give and take repeatedly...”
He only dropped out of this next debate - not the rest of them.