The Trump tax law is not popular. Remember, in the recent race for the House seat in western Pennsylvania, Republicans stopped running ads based on the tax cut because they weren’t working.
From the Monmouth Poll article: “The poll also finds that 34% of the public approve of the tax reform plan passed by Congress last December and 41% disapprove. Another 24% are not sure how they feel. These results have shifted in the past six weeks. Approval is down 6 points from 40% in late April and disapproval is down 3 points from 44%. The number who give no opinion on the plan has risen 8 points from 16%. Polls earlier this year had shown a more evenly divided public – 41% approve to 42% disapprove in March and 44% approve to 44% disapprove in January – with a smaller percentage of undecided opinion.”