Fiona Hill, President Trump's former top Russia expert, testified during Thursday's impeachment hearing that she told EU Ambassador Gordon Sondland earlier this year that the Trump administration's policy on Ukraine was "all going to blow up."

The big picture: Hill illustrated a dual-track policy that "diverged" seemingly at Trump's direction. According to her testimony, Sondland claimed to be reporting directly to the president and other senior White House officials to pursue a "domestic political errand" — investigations linked to the Biden family's business dealings in Ukraine — while National Security Council staff focused on traditional foreign policy.

Worth noting: This exchange came during Republicans' 45-minute questioning block.

Flashback: EU Ambassador Gordon Sondland testified yesterday that Rudy Giuliani headed up the White House's diplomatic efforts in Ukraine, saying that he only worked with Trump's personal lawyer "because the president directed us to do so."

Go deeper: Live updates on Fiona Hill and Holmes' impeachment testimony