Washington (CNN) Michigan Democratic Sen. Debbie Stabenow on Monday expressed skepticism that the Senate would vote this week on Attorney General nominee Loretta Lynch, and called the holdup on her nomination "politics at its worst."

"No more excuses. [The vote] shouldn't be tied to anything — if anything, we need her expertise as we deal with human trafficking," she said on CNN's "This Hour." "It makes no sense, and it's politics at its worst."

Senate Majority Leader Mitch McConnell has refused to bring Lynch up for a vote until Democrats drop their filibuster of an anti-human trafficking bill, which they're opposing because of an amendment barring the bill from funding abortions.

Her nomination has been stalled longer than any attorney general pick since the Reagan administration, and Democrats have decried the delay as "embarrassing," as President Barack Obama put it last week.

"Enough. Enough. Call Loretta Lynch for a vote, get her confirmed, let her do her job. This is embarrassing," Obama told reporters during a joint White House press conference with Italian Prime Minister Matteo Renzi

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