In Kansas, Republican Ron Estes won a congressional seat in a special election Tuesday in a surprisingly close vote for a heavily conservative district. Estes beat Democratic challenger James Thompson by a slim 53-46 margin, in a district that Donald Trump carried by 27 percentage points last November. The narrow victory could signal trouble for Republicans in another congressional special election in Georgia next week—and could be a sign of voter anger against the Republican Party less than 100 days into the Trump administration.