Former Colorado Gov. John Hickenlooper (D) officially launched his 2020 presidential campaign on Thursday, taking a swipe at President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE while promoting a vision for a more unified country.

Hickenlooper, who announced his bid earlier this week, told supporters in Denver it was "essential" to defeat Trump in 2020.

He cast the president as a divisive figure with harmful policies, and pledged to move the country forward by bringing leaders together.

"We have every right to live in a land that’s the home of hope," Hickenlooper said. "But these days, that’s not how it feels in America. It feels like we’re living in a heaving crisis - years in the making - spawned by dysfunctional politics - and defined above all by this president."

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"Donald Trump is alienating our allies, ripping away our health care, endangering our planet, and destroying our democracy."

He cited Trump's "daily insults" on Twitter, saying they "range from shocking to unconscionable."

Hickenlooper also attacked the Trump administration's practice of separating migrant families, noting, "Most people would call that kidnapping."

The two-term governor argued instead for greater unity.

"This isn’t about unity for unity’s sake," he said. "America stops working when we work against each other."

If elected, Hickenlooper vowed that his first act would be to rejoin the Paris Climate on the first day of his presidency.

He laid out additional goals, including developing a "green economy" and combatting climate change, closing loopholes and increasing taxes on the wealthy and pushing for "universal, affordable" health care.

"I’m running for president because the only way to end the Trump crisis of division is with a leader who knows how to bring people together and get things done," he said.

Hickenlooper recalled his experience leading the state during damaging floods and wildfires, as well as a mass shooting at an Aurora, Colo., movie theater in 2012.

He further touted his administration's efforts to boost the state economy, implement Medicaid expansion and push for environmentally friendly legislation.

The 67-year-old joins a steadily growing field of presidential hopefuls vying for the Democratic nomination at a time when the party is keen to take out Trump.

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Former Vice President Joe Biden Joe BidenOmar fires back at Trump over rally remarks: 'This is my country' Trump mocks Biden appearance, mask use ahead of first debate Trump attacks Omar for criticizing US: 'How did you do where you came from?' MORE is also seen as nearly certain to get into the race, while former Rep. Beto O'Rourke Beto O'RourkeJimmy Carter says his son smoked pot with Willie Nelson on White House roof O'Rourke endorses Kennedy for Senate: 'A champion for the values we're most proud of' 2020 Democrats do convention Zoom call MORE (D-Texas) is mulling a campaign.

"I understand I’m not the first person in this race or the most well known person in this race," Hickenlooper quipped on Thursday. "But let me tell you: at 4 syllables and 12 letters, 'Hickenlooper' is now the biggest name in the race."