The DHS secretary is under fire from the pro-Trump base after suggesting a legal immigration system could help the economy, a rare crack in the mass-deportation push.

• Mullen, normally an immigration hardliner, said the country needs a rational legal path and that immigrants help the economy in some industries.
• MAGA figures including Steve Bannon and Jack Posobiec want him replaced with someone focused purely on mass deportations.
• Laura Loomer is pushing hardest, calling for his firing and floating herself as DHS chief while making anti-Muslim attacks.
• Loomer even threatened to deport commentators who criticize Israel, framing critics as jihadists.
• Trump's team says the president still backs Mullen, so his job looks safe for now.

Outlook: Expect the fight between the corporate wing that wants cheap labor and the base that wants pure deportations to keep splitting the party.