WATCH: Lawmakers refuse to say how many genders there are when confronted on Capitol Hill

WASHINGTON — Lawmakers refused to accidental however galore genders determination are erstwhile confronted conscionable days aft President Donald Trump proclaimed that determination are lone 2 "not changeable" sexes: antheral and female.

Former President Joe Biden refrained from defining sex arsenic strictly binary and issued directives supporting the designation of idiosyncratic sex individuality connected national documents. This included allowing Americans to prime "X" arsenic a sex enactment connected their passports, alongside antheral and female. In contrast, Trump's order, declaring the beingness of lone 2 genders, volition reverse efforts allowing the usage of a sex antithetic from that assigned astatine commencement connected documents similar driver's licenses.

In the aftermath of Trump's order, Fox News Digital surveyed lawmakers connected Capitol Hill astir the fig of recognized genders, but astir members of Congress refused to reply the question.

"I person 1 gathering to spell to, that's each I'm disquieted astir close now," Rep. Sylvia Garcia, D-Texas, told Fox erstwhile asked however galore genders determination are.

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Rep. Greg Casar, D-Texas, would not accidental however galore genders determination are erstwhile asked by Fox News Digital. (Fox News Digital)

Another Democrat, Rep. Don Beyer, D-Va., told Fox that determination are "two" genders but that "people are often uncertain what determination is."

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"These radical are ridiculous," Democrat Rep. Greg Casar of Texas said arsenic helium walked away. 

Rep. Maxwell Frost, D-Fla., arrives for a gathering of the House Democratic Caucus.

Other lawmakers who did not accidental however galore genders determination are included Rep. Maxwell Frost, D-Fla., and Rep. Pete Stauber, R-Minn.

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Trump is taking aim astatine respective of Biden's national orders surrounding sex identity, specified arsenic revoking the Enabling All Qualified Americans to Serve Their Country successful Uniform order, which allowed transgender radical to service successful the military. 

Fox News' Morgan Phillips contributed to this report.