Julia Letlow and former congressman John Fleming are set to square off in the Republican runoff to win Louisiana's U.S. Senate seat.
The race chooses a successor to retiring Senator Bill Cassidy.
Letlow has the support of former President Donald Trump.
Fleming says he is a opponent to the Trump‑backed candidate.
Voters have seen each candidates travel across the state.
The contest will demonstrate the extent of sway Trump still has with Louisiana GOP voters.
The runoff decides who will hold in the Senate next.