Yet her record speaks for itself. She voted for Barr and Interior Secretary David Bernhardt and opposed attempts to roll back the Trump administration’s coal deregulation regime earlier this month.

It’s an approach that has the potential to revive the Senate’s moribund middle but has left her something of a mystery to her Democratic colleagues, even fellow moderates.

“Haven’t had a lot of interaction with her. She’s kind of doing her own thing,” said Sen. Jon Tester (D-Mont.), a centrist senator with a more liberal voting record than Sinema’s.

Unlike any of her colleagues, she snubbed sitting Sen. Ed Markey and endorsed Rep. Joe Kennedy, an old House colleague and close friend, in the hotly contested Massachusetts Democratic Senate primary. That earned a rejoinder from Manchin: “I would never do that … made no sense to me at all.”

And she is criticizing senators in both parties for “highly partisan” statements on impeachment and is declining to endorse the House impeachment inquiry: “That’s not my job, that’s not my role.”

For all her distance from the establishment, Sinema also seems to have come to an understanding with Schumer, whom she opposed as Democratic leader during her 2018 campaign.

Like every member of the caucus, she gets random calls from Schumer frequently enough that she can easily break into a raspy New York accent while doing a brief impression of the minority leader: “‘Sinema! What’s new?’”

But when push comes to shove on important votes, she has a warning for party honchos: Leave her alone.

“Everyone knows that I am very independent-minded,” she said. “And that it’s not super useful to try and convince me otherwise.”

Sinema isn’t especially close with either Trump or Majority Leader Mitch McConnell (neither has her phone number, she said), but she doesn’t light into them the way most Democrats do. She’s working with McConnell to whip votes for repealing Obamacare’s medical device tax and said the president “certainly” knows who she is.

And observers watching her on the Senate floor during a vote would be forgiven for thinking she’s a Republican, considering her chats with GOP senators like Majority Whip John Thune of South Dakota, Tom Cotton of Arkansas and Kevin Cramer of North Dakota.

She spends at least as much time on the Republican side of the chamber as the Democratic half and lists Sen. Ted Cruz of Texas as an ally atop the Commerce Committee’s Aviation and Space subcommittee. Cruz returned the favor by declining to lump the Arizona Democrat in with what he sees as an increasingly socialist Democratic Party.

“I said to her one time: Why aren’t you a Republican? … she said: ‘I just couldn’t be,’” Cramer recounted.