CHEYENNE, Wyo. — On Tuesday, a relatively obscure Democrat is set to go up against John Barrasso, the long-standing and prominent Republican senator from Wyoming, facing significant challenges.

Scott Morrow, a retired official from the postal workers’ union, is making his bid to unseat Barrasso, who has been a notable presence in Wyoming politics for many years and has held his Senate position since 2007.

Barrasso is not only an orthopedic surgeon but also previously served as a state lawmaker in Casper prior to being appointed to fill the Senate seat left vacant by the late Sen. Craig Thomas. His reputation in the state was bolstered by a local television segment in which he shared insights on medical topics.

As a senator, Barrasso has actively criticized the Biden administration on multiple fronts, including issues related to immigration, fossil fuel policies, and environmental regulations.

Additionally, he has shown steadfast support for Donald Trump, managing to maintain favor with the former president, a feat that eluded former Wyoming U.S. Representative Liz Cheney, whose political career was upended two years ago.

Throughout his tenure, Barrasso has triumphed in three Senate elections by substantial margins.

Over his 17 years in the Senate, he has ascended to the role of chair of the Senate Republican Conference, ranking third among GOP members, and he also serves as the ranking member of the Senate Energy and Natural Resources Committee.

In contrast, Morrow is campaigning as an advocate for labor unions and emphasizing the importance of abortion rights, presenting a different set of priorities to the voters.