Donald Trump's primary night speech on Tuesday showed him moving toward a more presidential style that will propel him into the White House if he continues in the same vein, says former House Speaker Newt Gingrich."He was presidential. He was controlled," Gingrich said Tuesday on Fox News Channel's"It was thoughtful. It was a set-piece speech. It's what people want from a president. They want somebody they can rely on, who's thought it through and who they can count on to follow through."Gingrich, whose name has been floated as a possible running mate for Trump, has nevertheless been critical of some of Trump's recent actions, including his calling the judge in the Trump University lawsuit unfair to him because he is "Mexican," even though he was born in the United States.But the former speaker called Tuesday's speech, made with a teleprompter and touching on various issues, a "very big step in the right direction."If he can stay on that path and stay this disciplined, "he's going to be very formidable, and he's going to beat Hillary very badly this fall," Gingrich said. "She will not recover if she's caught up in a big-issue election with a disciplined Donald Trump. They won't be in the same league."Earlier on Fox News'Brit Hume said the speech was "strikingly different from the meandering things he's been saying in recent days."The message should help build a larger coalition to vote for him, political consultant Stuart Stevens told host Megyn Kelly."He's got to get people who aren't normally with you to convince them to come out and vote for you," Stevens said.