(CNN) Democratic 2020 contenders are using Donald Trump's State of the Union speech Tuesday night to showcase some of their major clashes with the President.

New York Sen. Kirsten Gillibrand is bringing a decorated transgender Navy member. Massachusetts Sen. Elizabeth Warren is bringing a labor leader recently furloughed from his job at the Department of Housing and Urban Development. California Sen. Kamala Harris is bringing a woman who lost her home in a wildfire.

They are among several lawmakers already running or weighing a 2020 presidential bid who are looking to send a clear message on a night Trump will command a national audience.

Gillibrand's guest is Blake Dremann, a transgender Navy lieutenant commander who has been deployed 11 times. The invitation comes after the Supreme Court allowed Trump's ban on transgender military service to go into effect.

Gillibrand, who battled the military's "Don't Ask, Don't Tell" policy, said she will introduce legislation in the Senate later this week that would protect transgender Americans' ability to serve in the military.

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