I think that the president should argue that if the house adjourns for the year before sending the articles of impeachment to the senate those impeachment proceedings are null and void with the whole process having to be started over again after sitting a new house.
Not quite.
The House has up to the end of the next Congress to send impeachment to the Senate.
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That’s two more years.
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That’s enough time for the Dems to try to get control of the Senate.
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That’s the hustle Polosi and Schiff are up to.
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Trump is impeached by the House for now, but not by Congress.
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If Reps regain control of the House, they can nullify the unforwarded impeachment.