Ruben said that Sinema wanted the party to fail.
On Monday, he re-posted a story about how Sinema was predicting a shift in power from the Democrats to the Republicans.
You could be out there helping our candidates, but my sense is that you would prefer the Democrats to lose control of the Senate and House
He criticized Sinema for being absent from the campaign in their home state.
I thought of it now. I have traveled around the country. "Donating, raising funds and encouraging people to come out and vote and I have seen you nowhere!"
According to Sinema's team, the senator had given more than $140,000 to Democratic candidates in this election cycle, but they wouldn't comment on that.
Representatives for Sinema didn't reply immediately.
The Democratic Party is trying to pass legislation in the Senate, but Sinema is blocking it.
Sinema was one of the hold outs in the way of the inflation reduction act. Sinema's colleague, Joe Manchin, tried to get her to vote for him on the Senate floor in order to get her to vote against him.
McConnell praised Sinema on Monday, saying she was the most effective first-term senator he had seen.
There is a chance of a challenge against Sinema in the Democratic primary. In January, he told CNN that he had been approached to challenge Sinema.
He said that he had received a lot of encouragement from elected officials, senators, unions, and big donors. You can imagine everything under the sun.