Afghanistan, Nov. 8 -- Pakistan's close relationship with US President Donald Trump faces fresh uncertainty after Democrats won control of Congress, raising the prospect of greater scrutiny of Islamabad's dealings with the White House and people close to the president.

Pakistan's military and political leadership spent the past two years strengthening ties with Trump, with army chief Field Marshal Asim Munir serving as the main channel of communication. Their relationship gained strategic importance after Islamabad helped facilitate contacts between Washington and Tehran during the US-Israel war with Iran.

However, the diplomatic outreach has yet to produce substantial economic gains for Pakistan, while several agreements involving Trump-...