Centrist Sen. Kyrsten Sinema (D-Arizona) has been a question mark ever since Sen. Joe Manchin(D-West Virginia) agreed to a scaled-down version of President Joe Biden‘s social spending bill after months of back and forth, but she confirmed late on Thursday that she will support the measures when it’s introduced on Saturday. “We have agreed to remove the carried interest tax provision, protect advanced manufacturing, and boost our clean energy economy in the Senate’s budget reconciliation legislation,” Sinema announced. “Subject to the Parliamentarian’s review, I’ll move forward.” Sinema’s chang…