Yes. But it’s a ridiculous term to be sure. For starters, there are no “Conservatives” left in federal office as Democrats (the most “Conservative” member would be a left-wing RINO). This group was also founded in 1995, before the Orwellian newspeak color switcheroo in 2000, which also compounds confusion for those unaware (since “Blue” is recast as leftist, that makes it sound like these are the left of the left).
In Canada, the far-left in the Conservative Party are called “Red Tories.” I have no problem labeling “Red RINOs” for the similarly far-left or “Blue Democrats” if there were any actual Conservatives, but as long as said parties are more left as opposed to right, calling them by opposite colors remains offensive, especially when one (Reds) is explicitly associated with leftist totalitarianism and terror, whereas that is the polar opposite of what the GOP is supposed to stand for.
In the current U.S. Senate, using the American Conservative Union’s tracking of votes on issues of greatest concern to conservatives, Bill Nelson (D-Fl) votes conservative 30% of the time, Democrat Joe Donnelly of Indiana votes conservative 29% of the time and Joe Manchin (D-WV) votes conservative 27% of the time.
The least conservative Republicans are Susan Collins of Maine who votes conservative only 47% of the time, Mark Kirk (R-Il), 57% conservative and Alaska’s Lisa Murkowski who votes conservative 67% of the time.
In the House, while the vast majority of Democrats are in single digits or vote conservative zero percent of the time there are a few like Colin Peterson of Minnesota with a 33% conservative rating, Jim Cooper of Tennessee at 21% conservative and Brad Ashford of Nebraska at 17%.