Rep. Mark Amodei and Sen Dean Heller voted more than 75 percent of the time with the American Conservative Union last year on bills the group picked to rate the conservative outlook of lawmakers.

"It is our hope that these ratings will serve as a guide showing who you can rely on to fight for conservative principles and restore the role of government to what our nation's founding fathers envisioned," Matt Schlapp, ACU chairman, said in a statement announcing its ratings for the first session of the 115th Congress.

Amodei scored 80 percent and Heller scored 76 percent, which were both below average for Republicans in each chamber. The average for Senate Republicans was 80 percent and the average for House Republicans was 82 percent, according to ACU.

The group highlighted Amodei's score, which was the minimum required to receive an award.

The votes ACU chose included the GOP tax reform bill, repeal of the Affordable Care Act (ACA) and the confirmation of Neil Gorsuch to the Supreme Court.

"Members of Congress who held firm during these historic votes have received double credit for upholding conservative principles," the ACU said.

Heller voted for the Republican tax plan, against the effort to repeal the ACA, and in favor of Gorsuch.

Amodei voted for the Republican tax law, in favor of the repeal of the ACA and, as a member of the House, did not have to vote on Supreme Court nominations.

Democrats in the congressional delegation all scored in single digits: Reps. Ruben Kihuen and Dina Titus received an 8 percent score, Rep. Jacky Rosen scored 4 percent and Sen. Catherine Cortez Masto posted a 0 percent tally.

The group also released ratings of Nevada state lawmakers, which showed Republican state senators voted with the ACU an average of 86 percent of the time while Republican members of the Assembly voted with the ACU 81 percent of the time.

"The 2016 election dramatically impacted the political landscape of not only Washington but state legislative chambers all across the country," Schlapp said. "Republicans now have control of both legislative chambers in 32 states, more than double the number they controlled in 2010. With these victories comes an ability to implement policies that restore individual liberty and return us to a limited form of government run by and for "We the People."

Democrats hold the majority in the state Senate and Assembly.

The ACU highlighted 18 state lawmakers who scored over 80 percent. Those included state Sens. Heidi Gansert, Don Gustavson, Pete Goicoechea, Scott Hammond, Joe Hardy, Becky Harris, Ben Kieckhefer, Michael Roberson and James Settelmeyer.

Nine members of the Assembly also scored over 80 percent. Those included Reps. John Ellison, John Hambrick, Ira Hansen, Lisa Krasner, Jim Marchant, Jim McArthur, Robin Titus, Jim Wheeler and Melissa Woodbury.