Donald Trump kept up his assault on the Democratic lawmakers leading impeachment proceedings on Wednesday, accusing House Intelligence Committee Chairman Adam Schiff of treason, as well as attacking the unidentified whistleblower who reported concerns about his behaviour. 
Trump also called for Schiff's resignation.
The Republican president has lashed out repeatedly at the impeachment inquiry, which was prompted by his phone call with the Ukrainian president that sought an investigation that would be damaging to a Democratic political opponent, former Vice President Joe Biden.

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