Another candidate has officially announced a challenge to President Trump in 2020. Washington state governor Jay Inslee has announced he will run for president based solely on a platform of climate change.

According to WECT6:

(Gray TV) – Jay Inslee, the governor of Washington state, is running for president with a single-issue focus on climate change.

The governor’s intention to compete for the Democratic nomination was announced in an article published Wednesday in The Atlantic.

Inslee has served as governor of the state since 2012. One of focuses has been environmental concerns in the state, including reducing the use of fossil fuels while pushing alternative energy development and boosting green jobs, according to his bio.

As governor, he also has pushed for investments in education, creating jobs, supporting workers and boosting the state’s transparency, his official bio said.

This platform goes directly against President Trump’s pro-fossil fuel stance. Trump has increased U.S. oil production and withdrawn the U.S. from the Paris Climate Accord since taking office.