Can you even imagine Republicans, even if they were in a minority in Congress, debating whether or not to call for the impeachment of a Democratic president known and documented as guilty of a wide range of high crimes and misdemeanors? In particular, if you can imagine that, can you imagine the Republicans who opposed impeachment arguing that they were doing so for strategic political reasons?
This is hard to imagine, because the Republicans won a majority in Congress by loudly proclaiming what they would do if they had it. The main thing they said they would do and still say they will do is oppose the agenda of the Democrats.
Meanwhile, Democratic voters and lapsed voters keep waiting for the Democrats to have an agenda. Polls show that most of us want strong positions on single-payer health care, clean elections, ending the war, shifting to renewable energy, investing in education, restoring the minimum wage, restoring New Orleans, and other policies that incumbent Democrats are usually - at best - taking baby steps on.