Sen. Kyrsten Sinema has joined with another Democrat, Sen. Joe Manchin, to block their party from eliminating the filibuster, despite attempts from her own party to persuade her to help eliminate the 60-vote requirement in order to advance most pieces of legislation.

Democrats do not have enough votes in the Senate to pass President Joe Biden’s $2.25 trillion infrastructure proposal due to six or seven Democrats who oppose raising the corporate tax rate to 28%. So pressure has started to build from within their party, partly due to wanting to ram through bills that have come from the far-left wing of the party.

Bills on voting rights, immigration, and gun control are piling up on Senate Majority Leader Chuck Schumer’s desk, but he is waiting to make sure there are enough votes — or, if not, attempt to change the Senate rules — in order for him to be able to advance legislation with as little consensus as possible using a vice-presidential tie-breaker.

“When you have a place that’s broken and not working, and many would say that’s the Senate today, I don’t think the solution is to erode the rules,” Sinema told the Wall Street Journal. “I think the solution is for senators to change their behavior and begin to work together, which is what the country wants us to do.”