Washington State's Democratic Governor Jay Inslee has announced his 2020 bid for the US presidential nomination, joining a lengthy list of contenders. Mr Inslee, 68, will make climate change his number one issue, calling it "the most urgent challenge of our time" in his first campaign video. He is the first governor to throw his hat into the ring, joining 12 other Democrats, including six senators. The two-term governor has been a fierce critic of President Donald Trump. "I'm running for president because I am the only candidate who will make defeating climate change our nation's number one priority," Mr Inslee says in the video, released on Friday. Mr Inslee's mid-term elections campaign ran on the platform of creating new energy jobs - his 2020 campaign video echoed the same, tying "defeating climate change" with transforming the economy. At a news conference on Friday, Mr Inslee said his national mission would focus on powering the economy with 100% clean energy, creating jobs, and focusing on "justice and inclusion...so no group is left to bear the cost of transition". "We are going to build electric cars in Michigan, we are going to build and install wind turbines in Iowa, we are going to install solar right here in Washington State," Mr Inslee said. In addition to his environmental efforts, Mr Inslee announced his other big proposals: raising the minimum wage, legalising marijuana, protecting net neutrality, investing in infrastructure and pushing for gun control. "We've banned bump stocks and we're not done - let's ban assault weapons and take weapons of war off our streets," he said. Mr Inslee will begin his campaigning efforts in Iowa on Tuesday and Nevada later next week, US media report. Elizabeth Warren, Kirsten Gillibrand, Amy Klobuchar, Kamala Harris and Bernie Sanders are among other declared contenders for the Democratic primary in 2020, the first time more than one woman has competed. AFP.