The House has sworn-in its second new member in as many days — Louisiana Republican Rep. Steve Scalise.

Voters sent him to Washington, D.C., in a special election over the weekend. He succeeds former Republican Rep. Bobby Jindal, who is now the state's governor.

On Tuesday, the House swore-in Democratic Rep. Don Cazayoux, who was also elected in Louisiana on Saturday.

Republicans were expected to hold Scalise's seat, but Democrats made a rare foray into historically-Republican turf with their victory in the Cazayoux seat.

Total House membership is now at 434 out of 435 available seats. Mississippi will hold a special election later this month to succeed Roger Wicker, who replaced Trent Lott in the U.S. Senate.

The House is currently composed of 235 Democrats and 199 Republicans.

FOX News' Chad Pergram contributed to this report.