Recently there was an editorial published in Christianity Today which criticized Trump as a "grossly immoral character":
Trump’s evangelical supporters have pointed to his Supreme Court nominees, his defense of religious liberty, and his stewardship of the economy, among other things, as achievements that justify their support of the president. We believe the impeachment hearings have made it absolutely clear, in a way the Mueller investigation did not, that President Trump has abused his authority for personal gain and betrayed his constitutional oath. The impeachment hearings have illuminated the president’s moral deficiencies for all to see. This damages the institution of the presidency, damages the reputation of our country, and damages both the spirit and the future of our people. None of the president’s positives can balance the moral and political danger we face under a leader of such grossly immoral character.
It was roundly criticized by evangelical Christians. In an open letter, 200 evangelical leaders wrote:
"Rather, we are Bible-believing Christians and patriotic Americans who are simply grateful that our President has sought our advice as his administration has advanced policies that protect the unborn, promote religious freedom, reform our criminal justice system, contribute to strong working families through paid family leave, protect the freedom of conscience, prioritize parental rights, and ensure that our foreign policy aligns with our values while making our world safer, including through our support of the State of Israel," they said.
It seems to me that the leaders who signed the open letter are kind of missing the point. Okay, they love Trump's policies, but this doesn't mean they have to love Trump. Presumably they could support impeachment and simultaneously support a different president who'd continue Trump's policies. The same goes for the Republicans in Congress. Presumably they could support impeaching Trump, which might change the president but does not have to change the policies.
The author of the editorial in Christianity Today seems to think like this, since the quote acknowledges that Trump's policies are good, but opposes Trump based on his character. Why aren't there more people who think that way?
Related: Why aren't Republicans more focused on mobilizing a movement towards 'dethroning' Trump? which has the same issue - even if (per the top-voted answer) Trump's policies are a conservative dream come true, it's not an argument that impeaching Trump and making Mike Pence president wouldn't be an even better conservative dream come true.