In a video posted on his Twitter account, O'Rourke said, "This is a defining moment of truth for this country and for every single one of us. The challenges that we face right now, the interconnected crisis in our economy, our democracy and our climate have never been greater. They will either consume us, or they will afford us the greatest opportunity to unleash the genius of the United States of America"
In the video, O'Rourke further added that he will run a "positive campaign".
"This is going to be a positive campaign that seeks to bring out the very best from every single one of us; that seeks to unite a very divided country," said O'Rourke.
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