North American Politics Headlines at 6:17 a.m. EST

Trump campaign takes steps to prevent a challenge within GOP

Democratic contenders hoping to run on soaking the rich

Trump: NFL people thankful he signed criminal justice bill

Blackface photo stirs calls for Virginia governor to resign

State of the Union among most sensitive security challenges

Pentagon sending another 3,750 troops to Southwest border

Where the investigations related to President Trump stand

Analysis: Trump's State of Union comes amid political peril

Some lofty goals from 2018 State of Union speech still unmet

Changed Supreme Court weighing Louisiana abortion clinic law