First ladies typically avoid getting into public scraps.
But now, Michelle Obama is jumping into perhaps her biggest battle yet.
She's fighting a House Republican effort to soften a central part of her prized anti-childhood obesity campaign. She says she's ready "to fight until the bitter end."
At issue are school lunches and updated rules to make the meals more nutritious.
The School Nutrition Association, an industry-backed group that originally supported the standards, has now turned against them.
The association says it fully supports getting kids to eat healthier but says many districts are losing money because students aren't buying the healthier lunches.
A bill in the Republican-run House would give district a chance to apply to skip the requirements for one year.