"Maryland’s attorney general has joined 13 other states in supporting President Donald Trump’s revised travel ban."

Got the lede wrong.  MD has joined in 𝙤𝙥𝙥𝙤𝙨𝙞𝙣𝙜 the revised ban, not supporting it.

MD has a lot more Muslims and a lot more schools and students likely to be impacted by the ban.  So it's good that they've joined the case as an amicus.