They've been saying they were going to impeach Trump since before he took office. That would imply there was something Trump did before he took office that was worthy of impeachment. They've been throwing things at the wall for three years, hoping something would stick. Nothing has. This latest Ukraine quid pro quo is them trying to distract everyone from the fact that Trump was trying to investigate Biden's Ukraine quid pro quo.
The Democrats are trying to sell a story about what Trump might have done, but they are ignoring what Biden bragged about doing. Granted, you can't rely on anything Biden says, but he bragged about using his position as VP to end an investigation into his son's company.
Yes, he bragged about it.
Look, Trump is a jackass. He is unfit for the Presidency and an embarrassment to the country. That doesn't justify the Democrats repeatedly lying to try to get rid of him. If they put half the effort into effectively governing that they have into this impeachment nonsense, they would sweep back into the Oval Office and both houses of Congress.