Former House Speaker Newt Gingrich joined "The First 100 Days" Tuesday to discuss President-elect Donald Trump's transition just days before his inauguration.

Gingrich said Trump, who he called the "most controversial person to become president in modern times," is not going to change who he is now that he is set to officially become president.

"I'm very much in the group that believes that Donald Trump has to be Donald Trump," Gingrich said. "He got here despite everything. He beat 16 other Republicans. He beat a secretary of state with a billion dollars and the elite media on her side. He's done it his way, and his way is to be transparent. Yes he makes mistakes, but they're out in the open. He learns from his mistakes."

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Gingrich compared Trump to former British Prime Minister Margaret Thatcher in that the left was vehemently against her. Similarly, Trump will be up against the left constantly.

"He represents real change, and real change scares the left," Gingrich said.

Gingrich also said he hopes Trump continues to tweet upon becoming president.

"He's blunt, he's direct, he counterpunches always. You hit him, he's gonna hit back. That's who he is. That's who got elected president, and it makes Washington very nervous. ... Donald J. Trump is going to be Donald J. Trump," he said.

Watch the full interview above, and share your thoughts in the comments section.

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