Here is Pat Buchanan on the question --
Do Democrats Want an Impeachment Fight?, by Patrick Buchanan
" .... Democrats who have grown giddy about taking the House should consider what a campaign to bring down a president, who is supported by a huge swath of the nation and has fighting allies in the press, would be like.
Why do it? Especially if they knew in advance the Senate would not convict.
That America has no desire for a political struggle to the death over impeachment is evident. Recognition of this reality is why the Democratic Party is assuring America that impeachment is not what they have in mind.
Today, it is Republicans leaders who are under pressure to break with Trump, denounce him, and call for new investigations into alleged collusion with the Russians. But if Democrats capture the House, then they will be the ones under intolerable pressure from their own media auxiliaries to pursue impeachment.
Taking the House would put newly elected Democrats under fire from the right for forming a lynch mob, and from the mainstream media for not doing their duty and moving immediately to impeach Trump.
Democrats have been laboring for two years to win back the House. But if they discover that the first duty demanded of them, by their own rabid followers, is to impeach President Trump, they may wonder why they were so eager to win it."