Hundreds of people gathered in San Francisco, California to protest against U.S. President Donald Trump’s plan to ban transgender people from the U.S. Military.

Earlier in the day Trump said he would ban transgender people from the U.S. Military, a move appealing to some in his conservative political base but creating uncertainty about the fate of thousands of transgender service members.

The administration has not determined whether transgender individuals already serving in the military would be immediately thrown out, a point the white house and pentagon have yet to decide.

A transgender ban would reverse democratic Former President Barack Obama’s policy and halts years of efforts to eliminate barriers to military service based on gender identity.