They should weep.
They have invested all this time in the whole quid pro quo case, only to fail to make the case. They have a dearth of evidence of wrongdoing by Trump. All they have are the surmises of people connected to Trump. Gordon Sondland, one of their most important witnesses, changed his testimony, apparently after people boycotted his hotels and harassed clients. Dr. Fiona Hill's testimony today contained some factual inaccuracies. Nunes made her look like she was going to soil herself. The NYT and WaPo today printed articles obviously slanted towards impeachment, but devoid of any facts. Support for impeachment has dropped and Trump's approval has risen.
All the left can do at this point is wail impotently that they have won and it is republicans who are living in some alternate reality.