James R. Gadwood, the president's nominee for chief counsel at the Internal Revenue Service, works at Miller & Chevalier, which has represented Mr. Trump in tax matters.
Adrian Boafo, a state delegate, won a primary to succeed the retiring Representative Steny Hoyer with help from more than $11 million in spending from pro-Israel and cryptocurrency interests.
The runoff was one of the few races this year featuring both candidates endorsed by President Trump. His picks have had mixed results in governor's contests.
A lopsided House vote cleared the measure for President Trump's signature after a lengthy back and forth and several nearly fatal blows to the legislation.
In two competitive Democratic primaries, well-funded interest groups as well as wealthy candidates themselves have poured tens of millions of dollars into advertising.
President Trump appears to be describing his preferences as fully negotiated deals, in hopes of locking the Iranians in. The question is whether a succession of such disputes will sink the whole venture.
A recent episode underscored the Trump administration's increasing reliance on advanced A.I. systems for cybersecurity even as it battles a leading U.S. developer.
A few Republicans joined Democrats in favor of a measure instructing President Trump to halt military operations against Iran or seek congressional authorization.
Their split with the Republican Party represents an expansion of a feud with President Trump that could further complicate the party's midterm prospects.