According to a really interesting article in The Hill, “Republicans in Congress are coalescing around a slow-down strategy designed to stifle the Democrats’ impeachment investigation into Donald Trump”. Mike Lillis states that

It’s a strategy that mimics the administration’s largely successful efforts to hamper investigations into Trump’s role in Russia’s 2016 election interference. The White House refused requests for disputed information in those probes, and the battles are now bogged down in the courts.

Republicans are now pulling a page from that playbook in hopes of smothering the impeachment inquiry arising from Trump’s communications with Ukraine before it gains any more steam.

The White House on Tuesday evening said it would halt all cooperation with the Democratic investigations, a decision prefaced by the State Department’s decision that morning to block a key witness, U.S. Ambassador to the European Union Gordon Sondland, from being deposed on Capitol Hill.

Read more about this development here.