Trump's acquittal did not come because of party politics or friends in Washington. It came because he stood fast—he held his ground in a party that tried to denounce him early on. He had many good friends helping, but it was Trump himself that empowered their efforts and directed the flow.
The Republican Party is not what it seems. They hated Trump when he didn't do things in their failing manner, but now they acquit him and act like they have always been BFF from the beginning. Any disagreements in Trump's early days don't matter anymore, even though that's not the tone they used at the time, though a number of those Republicans are out of office.
It's typical. The Republicans held their noses while Reagan gave them success. They passed Democratic-oriented, anti-Conservative laws during the W. Bush years viz the Patriot Act. They objected to Conservative voices in media during the 2005 "Build a Fence" movement viz Senator Lott. Thanks to Trump's inability to be railroaded, they are being gifted more success and clout than they ever didn't earn before.
Senator McConnell stayed true to the colors he flew, which is more than can be said for the late Senator McCain or Senator Romney, who took his unofficial place as "Republican Senate maverick". Senator Romney's departure from the fold could make him a one-term Senator—and not from lack of RNC backing. Senator Graham and many others took their stand for law, order, facts, evidence, process, and truth. The Republican Party stood behind their president, this time. Had former House Republicans not been card-carrying members of the metaphorical "never Trumper" movement, Republicans might still hold the House and none of this ugly impeachment would have happened.
Justice came from Republicans this time; don't get used to it. While Democrats are the party of hate and failed "we wanna' help you" platitudes, the Republicans are the party of treachery. Democrats stand together while Republicans usually don't. It was a strange week in Washington. Things will be fine through the Trump years because they will depend on him. But after that, buckle up.