"Mr. Nadler has said repeatedly that his committee is engaged in an impeachment investigation — or, if you prefer, an impeachment inquiry."
"He insists the 'nomenclature' does not matter. The House speaker, Nancy Pelosi, and her leadership team clearly disagree. They assiduously avoid the 'I' word, painting the committee’s work as garden-variety oversight. As a result, even Democratic lawmakers don’t seem to know whether they are engaged in an impeachment inquiry. Representative Pramila Jayapal has said 'yes.' Representative Jim Himes has said 'no.' Last week, Steny Hoyer, the House majority leader, said 'no' — then backtracked, claimed he’d misheard the question and offered a non-answer instead...." From "When Is Impeachment Not Impeachment?/When the speaker of the House thinks it is politically foolhardy" by the NYT The Editorial Board