CNSNews.com) — According to the 48th edition of the American Conservative Union’s (ACU) Ratings of Congress report , Representatives Dave Brat (R-Va.), Ted Budd (R-N.C.), Jim Jordan (R-Ohio), and Debbie Lesko (R-Ariz.) have maintained a 100% lifetime conservative rating.

Although 11 other members of Congress also received a 100% rating for 2018, they have not maintained it for their entire careers in Congress. Of those 11, only Senator Rand Paul (R-Ky.) was awarded 100% for both 2017 and 2018.

The ACU rates elected officials by defining conservatism, as detailed in both its report and website , and taking into account their stances on specific types of legislation.

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The ACU selects then selects bills that focus on Ronald Reagan’s philosophy of the “three-legged stool” to rate each congressman:

Fiscal and economic: taxes, budgets, regulation, spending, healthcare, and property; Social and cultural: Second Amendment, religion, life, welfare, and education; and National security: preserving our nation’s security by maintaining a strong national defense.

The report finds that Democrats are more concentrated to the far left, while Republicans are more ideologically diverse. The Republicans’ average conservative rating was 82% in the Senate and 77% in the House.

In contrast, Democrats’ average conservative rating was 10% in the Senate and 8% in the House.

At 36%, the highest-rated Democrat senator — Joe Manchin (D-W.V.) — had the same rating in 2018 as the lowest-rated Republican senator — Lisa Murkowski (R-Alaska). In the House for 2018, the highest-rated Democrat was Henry Cuellar (D-Texas) at 40%, while the lowest-rated Republicans, Michael Fitzpatrick (R-Pa.) and Ileana Ros-Lehtinen (R-Fla.), each scored a rating of 24%.

Four members of the last Congress received a 0% conservative rating for 2018:

Rep. Mike Capuano (D-Mass.),

Rep. Joe Crowley (D-N.Y.),

Rep. Alan Lowenthal (D-Calif.), and

Rep. Bennie Thompson (D-Miss.)

The most consistent non-conservative voting member of the House of Representatives is Rep. Deborah Wasserman Schultz (D-Fla). During her 14 years of service, she has received a 1.55% lifetime rating. The most consistent non-conservative member of the Senate is Senator Mazie Hirono (D-Hawaii), who has received a lifetime rating of 1.46% over 12 years of service.