Two recent polls of Montana's upcoming U.S. House special election show a single digit lead for the Republican. The seat became vacant after Ryan Zinke resigned March 1 to become Secretary of the Interior.
The most recent poll, from Gravis Marketing, gives Republican Greg Gianforte an 8 point lead over his Democratic challenger Rob Quist. A late April poll from Democratic pollster Garin-Hart-Yang showed a similar 6 point Gianforte lead.
This is a statewide race, as Montana has a single congressional district. The seat has been in Republican hands since 1997. Zinke won re-election by 16% last November, while Trump did even better, outpacing Hillary Clinton by 20%.