I agree have no confidence that the Senate would acquit.Anyone that knows the history of the Republicans vs.Democrats knows that the Republicans have caved time and time again. And the Senate is filled with anti Trumpers and never Trumpers. Plus the Republicans hate President Trump more that the Democrat. The Senate might vote to acquit,but I would not count or depend on it.
Someone did an analysis earlier and concluded that there were at least 38 reliable Trump Senate votes. If true there will be no impeachment conviction for removal - need 67 votes. A five vote cushion. I think the analysis makes sense.