I get a monthly Civil Service pension. The federal tax deduction was lowered effective with the February payment. The new rate is only 83% of the old one. I doubt my actual taxes will be lowered that much. They may not be lowered at all since I live in one of the blue states Republicans want to punish. I changed it back to the old withholding rate.
The whole thing seems like a scam. Lower the rates now so people think they have more money and are more likely to vote for Republicans in the 2018 elections. Then, when they file their returns in 2019, they will see that the real tax decrease was not that low and they may even owe money. Sad!