Do you really think a sweeter attitude from Trump would have changed one critical McCain vote he knifed us with? I don't. Not his style. Such is the way with RINOS like him: Will always vote against you, right at the moment he's needed the most.
He was cultivating his Jr. Senator from AZ, and with Flake falling away today, McCain's failure is complete. Deeelish!
It was going to be tough pushing bills through the senate, but Trump made it personal, early & often. McCain was a given after Trump attacked his service. Flake and Corker were pushed over the edge and will no longer be accountable to the voters. As a result, Trump will spend his entire term as a lame duck president.
George W had a 50/50 senate and slimmer house majority, but he got his tax cut within a few months. The key difference being his experience as governor and knowing how to deal with a coequal branch.