Bernie Sanders' relatable opening line on The Late Show with Stephen Colbert last night?

"It's been a tough week."

The Senator and former Democratic presidential candidate sat down with Colbert to discuss the recent presidential election, his new book Our Revolution and the future of the U.S.

"Our job now, in my view, is to figure out how we create an effective opposition [to Trump]," Sanders explained.

"Something is fundamentally wrong, and what I'm trying to do right now is to bring about structural changes in the Democratic party, so that it becomes a grassroots party," he said.

He also chatted about his new book Our Revolution and expressed that he is still hopeful for the future of the country.

"The vast majority of people are on our side. Trump's views are a minority," Sanders said.

Sanders has no plans to sit idly by – he is standing by the cover of his book and ready to lead a political revolution. And his advice for people who want to help is to get involved.

"What you do now is get involved heavily into the political process," Sanders told the audience. "When millions of people stand up and fight back we will not be denied. We're gonna stand together and fight for a government and an economy that works for all of us."