The Constitution prohibits religious tests for holding office (Article VI), but contains no mechanism to remove someone for expressing hate speech including anti-Constitutional Islamophobia (an inversion of the religious tests for holding office).
KKK membership itself has never been illegal, while the KKK in principle is the Arkansas born and bred domestic terrorism platform for those who refuse to admit defeat in the Civil War. President Woodrow Wilson infamously restarted the KKK from the White House and in 1919 sent federal troops to murder American Blacks in Elaine, Arkansas.

Hugo Black was a KKK member before FDR put him on the Supreme Court. Robert Byrd was a KKK organizer before serving 51 years in the Senate.
Republican leadership today choosing not to respond to obvious signs of the KKK in office is their official response: enablement. The caucus calculates that hate speech like Islamophobia costs them nothing with their base and that Democrats denouncing it plays as culture war theater to their voters.

Rep. Andy Ogles (R-TN) posted Monday:
Muslims “don’t belong in American society” and “pluralism is a lie”.
Rep. Randy Fine (R-FL) wrote in February:choosing between dogs and Muslims (a KKK dog whistle) was
not a difficult one
Rep. Andrew Clyde (R-GA) posted:
No more Islamic immigration. Denaturalize, deport, repeat.
Speaker Johnson, himself showing KKK indicators, did not respond to any of it.
Hitler campaigned into office by calling democracy a Jewish conspiracy. Johnson has campaigned that democracy is bad for America. The pattern is not subtle.
Fine has faced no consequences. Ogles has faced no consequences. Johnson only accumulated more power to end democracy. The KKK pattern across three members in two months is the GOP platform, not an accident.
How many times has the KKK been in government?
More than most Americans want to know. Wikipedia’s documented list of KKK members in U.S. politics is extensive and explicitly partial.
Klan membership was “invisible” by design, so confirmed figures are a floor, not a ceiling. “America First” membership is the older and more accurate measure.

The Washington Post reported that by 1930 the KKK claimed 11 governors, 16 senators, and as many as 75 congressmen. The names were never released.
During the 1920s “second wave,” the Klan didn’t lurk at the margins while it controlled state governments. JSTOR Daily documents that Indiana’s Republican Party was heavily Klan-influenced, with one third of white American-born men joining. Oregon, Colorado, Oklahoma, and Texas saw Klan members in state legislatures. Alabama governor David Bibb Graves was himself Grand Cyclops of the Montgomery chapter. Dallas held a Ku Klux Klan Day at its county fair in 1923. The city police commissioner and county sheriff were Klansmen.

Hugo Black, who spent 34 years on the Supreme Court, had joined the Klan in 1923 delivered over 100 anti-Catholic speeches to Klan meetings. Nonetheless, FDR nominated him in 1937. When his membership was revealed, Black went on radio to acknowledge it and kept his seat. The Senate confirmed him anyway. Biographers note he later became one of the Court’s most consistent civil libertarians, which also tells you something about institutional incentive structures rather than anything reassuring about the Klan.
The machinery that kept Klansmen in office was simple: no expulsion mechanism, a membership base that rewarded the rhetoric, and leadership that calculated silence as the safer bet. President Ford, the only president to never be elected, was a prominent member of the infamous pro-Hitler movement in the 1940s whose members later were charged with sedition, but not him.

That calculus has not changed. The names and targets have.
Three members. Two months. Pushing unconstitutional religious tests. No consequences. The historical continuity is plain for all to see.