WASHINGTON—The House narrowly passed Republicans’ sprawling tax-and-spending bill, delivering a major second-term victory for President Trump and again demonstrating his power to keep GOP lawmakers in line.

Speaker Mike Johnson (R-LA) hoped the House would quickly pass the Republicans’ big bill, but that wasn’t the case, until he got his party in line.

But almost all of the Republican holdouts on the megabill flipped and voted to advance the legislation early Thursday — setting up a final vote. During the all-nighter, GOP leaders kept the procedural vote open for almost six hours as they worked to flip 12 votes.