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