Republican presidential front-runner Donald Trump showed up nearly an hour late to his campaign rally in Baton Rouge, La., Thursday, leaving him to compete with the sixth Democratic primary debate.

The New York billionaire was set to begin his latest rally at 8 p.m. ET, but didn't take the stage until minutes before 9 o'clock, the starting time of the primetime debate on CNN. Trump's campaign did not immediately identify what caused the delay. Instead, the GOP hopeful kicked off his remarks by calling attention to the thousands of supporters packed inside the Baton Rouge River Center.

"Look at this crowd," Trump exclaimed as soon as he took the stage. "You know, we have 5,000 people waiting outside trying to get in. Should we wait for them? I don't think so."

Trump didn't mention anything about his rally running simultaneously with the Democratic debate, but the brash businessman has previously mocked the Democrats' poor ratings for their primary debates.

During his rally, Trump, who rode to victory in New Hampshire primary earlier this week, told his supporters he would definitely seek reelection — an "easier four years," as he put it — if he succeeds in his bid for the White House.

The real estate mogul is slated to head arrive in Florida on Friday for another rally in Tampa before he competes in the eighth Republican primary debate on Saturday evening.