Montana Congressional candidate Greg Gianforte announced on Thursday that Donald Trump, Jr. will return to Montana to urge voters to elect Gianforte to the seat vacated by now Interior Secretary Ryan Zinke.

"It's great to have Donald Trump, Jr. return to Montana and join me on the campaign trail," Gianforte said. "I appreciate his strong support because he understands what's at stake for our country and the importance of electing someone who will work with President Trump, not Nancy Pelosi."

The rallies will take place in Helena, Great Falls and Sidney on Thursday, May 11, although no specific schedule has yet been announced.

The special election will be held on May 25, and will be a traditional polling place election.