While a majority of GOP lawmakers plan to attend -- with some planning to speak -- many members of Congress are skipping the convention.
Here's what many will be doing instead:
Instead of attending Trump’s coronation, Sen. Ben Sasse, R-Nebraska, a leading voice in the "Never Trump" movement, plans to “take his kids to watch some dumpster fires across the state, all of which enjoy more popularity than the current front-runners,” according to his office.
"I'm going to be fly-fishing with my sweet wife," said Sen. Steve Daines, R-Montana.
House GOP Conference Chair Cathy McMorris Rodgers, R-Washington, a member of House Republican leadership and the highest-ranking Republican woman in Congress, will no longer be attending the convention in Cleveland, and will instead spend the week in Washington State to attend a memorial service for a friend, according to a spokesperson.
THE CAMPAIGN TRAIL
It’s not uncommon for lawmakers up for reelection to opt to campaign instead of attend the nominating conventions.
House members like Reps. David Jolly of Florida and Mike Coffman of Colorado, who are in close contests in swing states, will spend the week canvassing their districts.
Some members are even leaving the country.
House Oversight Committee Chairman Jason Chaffetz is leading a delegation to the Middle East during the week of the convention.
“I’ve got an interest in the military, learning more about it, meeting some of our troops, so this was a great opportunity to do that,” said Rep. Bruce Westerman, R-Arkansas, who was planning to go to Cleveland before the trip came up several months ago.
“The people who are going are obviously aware that they’re going during the convention,” said Rep. Reid Ribble, R-Wisconsin, a vocal anti-Trump Republican.
“I went to the convention four years ago, and there were a lot of members who didn’t go,” he added. “This has just become the story because of Donald Trump.”
Reps. Mike Quigley, D-Illinois, and Mark DeSaulnier, D-California, are also traveling as part of Chaffetz’s trip.
Overseas delegation trips are approved by congressional leadership.
ABC's Tom Thornton contributed to this report.