Editors at Issues and Insights highlight an interesting omission from last week’s Democratic National Convention.

Eight months ago, all but two House Democrats voted to impeach President Donald Trump, and in February every Democratic senator found him guilty of high crimes and misdemeanors.

As the articles of impeachment were heading over to the Senate to face certain defeat, House Speaker Nancy Pelosi intoned that “This president is impeached for life regardless of any gamesmanship on the part of Mitch McConnell. There is nothing the Senate can do to ever erase that.”

Her comment prompted “#ImpeachedForLife” to trend on Twitter shortly afterward.

Yet when Pelosi spoke at the Democratic National Convention on Wednesday, she never mentioned Trump’s impeachment. She didn’t mention Ukraine, or Russia or any of the other reasons Democrats spent three years arguing were grounds for his removal from office.

Her main complaint about Trump was that “As speaker of the House I’ve seen firsthand Donald Trump’s disrespect for facts , for working families and for women in particular.”

No other House member who voted to impeach Trump, and no senator who found him guilty of high crimes and misdemeanors, mentioned his impeachment. Nor did Barack Obama, or Michael Bloomberg (who paid for ads in 27 states in January calling for Trump’s removal). Nor did the hosts. Nor did Joe Biden.

In fact, we reviewed transcripts of the entire four days, and the word impeach was never uttered once.

Democrats spent almost the entire past four years arguing that Trump was an illegitimate president because Russia interfered with the election. They spent every waking minute trying to drive him out of office for supposedly enlisting Ukraine to help with his reelection.

And now their big complaint is that he’s been dissing the U.S. Postal Service?

So if impeachment was never that serious — which Democrats have admitted by omission — why should anyone take seriously the arguments they are making for Trump’s defeat in November?