The Dems would like you to believe that the Republicans control the Senate. Not true, that is, unless they decide to change the rules. Right now, in order to pass a bill, it takes 60 votes. The Republicans only have fifty-one. Unless the rule is changed, the 49 senators can stop anything and everything. …and they have been doing a lot of that lately. So far, they have stopped over 100 in 2017.
One bill they were not able to stop was the tax reduction and that is because they used one rule to get around the other. The Republicans passed the bill with 51 votes. (As a result of having to resort to this method, they were not able to make all the tax reductions permanent. After a time, some individual taxes will return to what they were in 2017. Hopefully, between now and then, the changes will be made permanent, or at least extended. It sort of depends on if the Dems block the effort.)
I guess this is the sort of thing that happens when we let lawyers run our government.