MICHAEL BARONE: Donald Trump’s insincere process arguments.

“Today, winning votes doesn’t mean anything,” Trump complained. “It’s a corrupt deal going on in this country and it’s not fair to you people.”

Such complaints typically come from people who are not, in one of Trump’s favorite words, “winners.” Trump conspicuously refrains from complaining that, though he has won just 37 percent of votes cast in Republican primaries and caucuses, those votes have given him 46 percent of the delegates.

That happened because of the rules. Trump has benefited from winner-take-all rules in states like Florida and Arizona. He has benefited from split opposition: in only one state (Massachusetts) has he won more popular votes than the combined total for Cruz, Marco Rubio and John Kasich.

The actual presidency is tougher and less forgiving than the primary race — and the Democrat nominee will be, too.