Washington (CNN) Former Tallahassee Mayor Andrew Gillum, who lost a bid for Florida governor in November, is launching a voter registration effort with the intent of denying Donald Trump a second term.

"We are going to commit ourselves to registering and engaging 1 million voters between now and the presidential election in 2020," Gillum told a crowd of supporters in Miami Gardens Wednesday.

Gillum, currently a CNN political commentator, argued that the "road to the White House runs through Florida."

"We can deny Donald Trump a second term right here in Florida," he said. Trump narrowly won Florida's 29 electoral votes in 2016.

The new voter registration group -- "Bring It Home Florida," named after Gillum's 2018 campaign slogan" -- aims to send Trump a message: "'Sir, your eviction notice is served and you are out of the White House,'" Gillum told the crowd Wednesday.

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