![Biggest challenge to Senate GOP these days is from conservatives](https://www.theblaze.com/media-library/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vd3d3LnRoZWJsYXplLmNvbS93cC1jb250ZW50L3VwbG9hZHMvMjAxMy8wOS82MDB4MzkzNC5qcGciLCJleHBpcmVzX2F0IjoxNzU3MDUzMTIzfQ.faWkVoCqpv1wZ6iUWKQXIY8ZsN5nb_O_Qe7554i8lZM/image.jpg?width=980&quality=85)
Sen. Ted Cruz, R-Texas, speaks at a news conference with conservative Congressional Republicans who persuaded the House leadership to include defunding the Affordable Care Act in legislation to prevent a government shutdown, at the Capitol in Washington, Thursday, Sept. 19, 2013.
Credit: AP