Democrats were putting the finishing touches Friday on a massive climate and spending package that they expect to pass on a party-line vote to deliver a significant political victory for President Joe Biden ahead of the midterm elections. With moderate holdout Sen. Krysten Sinema, D-Ariz., falling in line, Senate Majority Leader Chuck Schumer, D-N.Y., says he has all 50 Democratic votes to pass the so-called Inflation Reduction Act using a complicated legislative procedure that will start Saturday. The 11th-hour tweaks include some tax changes demanded by Sinema to win her support after fellow…