It happens every time.

While most Republicans proudly run for office as conservatives and then govern that way, Democrats typically conceal their liberal beliefs and pose as “moderates” and “centrists.”

Once elected, they swing Left and startle voters who sign up for compassion and get stuck with socialism.

“Moderate Joe Biden” found himself in the White House. Surprise! He reigns miles to the Left of presidents Lyndon  Johnson, Bill Clinton, and even Obama.

Americans are paying dearly for Biden’s bamboozling them in 2020. Inflation, violent crime, illegal aliens, transgenderism, and neo-authoritarianism run rampant, from sea to shining sea.

Democrats are at it again: U.S. Senate incumbents running for re-election masquerade as moderates, often with the regime media trumpeting their “centrism.” If elected, they will abandon the “middle of the road” and ride the left shoulder on the Highway to Hell.

The American Conservative Union offers a quick and reliable test for alleged centrism. ACU rates lawmakers’ key votes. Zero is most liberal; 100 is most conservative. Scores between 33 and 66 occupy the middle of the ideological spectrum.

Also, FiveThirtyEight.com tracks how frequently legislators support Biden’s agenda — from 0% to 100%. The more they vote with the Left-wing Biden, the further Left they reveal themselves to be.

These metrics confirm that Democrat Senate incumbents facing re-election on November 8 are MINOs: Moderates in Name Only.

— Michael Bennet of Colorado: Politico describes Bennet as “a quiet moderate.” Slate calls him “a relative centrist.” Nevertheless, Bennet’s ACU rating is a paltry 5.7, and he votes with Biden 98.1% of the time.

— Catherine Cortez Masto of Nevada: The Las Vegas Sun-Sentinel paints her as “reasonable, moderate and eminently capable.” (ACU: 5.6/Biden: 92.7%)

— Maggie Hassan of New Hampshire, per the so-called “Paper of Record,” “is working to burnish her centrist image without making political waves.” (6.7/96.4%)

— Mark Kelly of Arizona is “touting centrist policies and his efforts to reach across the aisle,” National Public Radio reports. (12.8/94.4%)

— Raphael Warnock of Georgia “has positioned himself as a traditional, center-left, Bidenish Democrat,” the Washington Post observes. (7.7/96.4%)

These senators seem inoffensive. They do not resemble far-Left extremists such as Bill Ayers, Angela Davis, or the Rev. Jeremiah Wright. Unfortunately, their vote records expose them as the Not Ready for the Rotary Club Players.

“Moderate” senators Bennet and Cortez Masto are Left of Senator Bernie Sanders (Socialist – Vermont), who enjoys a higher ACU rating and lower Biden-vote record (6.2/92.6%).

These five MINOs voted in lockstep for these radical measures:

— The $1.9 trillion American Rescue Plan — Biden’s baseline budget blowout, largely blamed for stimulating inflation rates unseen since Ronald Reagan cleaned up after Jimmy Carter.

— The ludicrously titled Inflation Reduction Act, infested with $737 billion in tax hikes and $437 billion in Green New Deal goodies.

— 86,852 brand-new IRS agents.

— Exposing taxpayers who earn under $400,000 to audits by these new IRS agents.

— Stimulus checks to state and federal prisoners. Cost: $1.9 billion.

— Cancellation of signed contracts for southern-border wall construction.

— As Senator Ted Cruz (R – Texas) told me, these five Democrats joined every other Democrat to confirm outspoken police-defunding advocates Kristen Clarke and Vanita Gupta to top Justice Department positions.

Voters should distrust and verify Democrat claims of “moderation.” Unlike stock prices, congressional vote records are an excellent predictor of future performance.

Genuinely moderate Democrats are nearly extinct. Formers senators such as Oklahoma’s David Boren, Louisiana’s John Breaux, and Georgia’s Sam Nunn might as well be on display at the Smithsonian’s Museum of Natural History, between the mastodon and the stegosaurus.

Any voter who discovers an actual centrist Democrat on the ballot should contact the U.S. Fish and Wildlife Service. It will dispatch an endangered species protection team at once.

Meanwhile, Americans who wish to endanger the political careers of the five aforementioned MINOs should support their Republican opponents, respectively, Colorado’s Joe O’Dea, Nevada’s Adam Laxalt, New Hampshire’s Don Bolduc, Arizona’s Blake Masters, and Georgia’s Herschel Walker.

Manhattan-based political commentor Deroy Murdock is a Fox News contributor. Aaron Cichon and Michael Malarkey contributed research to this opinion piece.