No, but they have been after Trump since he took office. They appear to be continually opposing the man not his ideology, hence since they have not been able to lay a glove on him, then whatever the impeachment plays like in the US, to the outside world it looks like another attempt to 'get Trump' and a ham-fisted one at that. The numbers across both houses do not add up and there has been no sign whatsoever that enough Republicans would vote against in the Senate to get a guilty verdict. This is not a surprise, not an unknown, not an unforeseeable outcome, it is as clear as day.
Hence, for the Democrats to proceed on this basis then this has indeed become a 'coup,' they have taken a serious constitutional process and used it very wantonly, simply just as a big stick to beat Trump about the head, to embarrass, to wound, but knowing it cannot to kill. I'm afraid that's what it looks like to all but the most ardent Democrats. The fact that Pelosi had to hold up her hand to prevent Democrats cheering at the announcement of Article 1, says it all, that shot went around the world!