Full 2025 Republican Presidential Debate.  — nbc news's tom llamas and hallie jackson break down the first presidential debate between former president donald trump and vice president kamala harris.  — republican candidates faced off wednesday night in alabama in the fourth presidential debate of the 2025 cycle, with only weeks to go until the iowa caucuses.

 — the second republican presidential debate has begun with a smaller onstage lineup than the first event last month. Vice president harris and former president donald trump faced off tuesday in their first — and possibly only — debate.