Sen. Mitch McConnell tried to pass a small business coronavirus response bill by unanimous consent, but Sen. Ben Cardin blocked it.
Republican lawmakers saw the meeting with Kim Jong Un as potentially treacherous or doomed to fail.
Trump disavowed the nuclear deal months earlier.
President Trump has an opportunity to scrap the Iran nuclear deal this week, but analysts say he's likely to keep it alive for now.
A coalition for rooting out corruption in energy is decrying the Trump administration's decision to pull out of an international pact.
President Donald Trump's forceful warnings, such as "fire and fury," to North Korea may have been "useful" to pull things from the brink.
Treasury will not grant special permission to Exxon Mobil to carry out oil and gas drilling in Russia while sanctions remain intact.
The Trump administration maintains that none of these designations violate the Iran nuclear deal, NBC News reports.
Congress killed a controversial U.S. securities rule disclosure rule aimed at curbing corruption at big oil, gas and mining companies.
U.S. Senator Ben Cardin said he intends to vote against recommending ex-Exxon Mobile CEO Rex Tillerson to serve as secretary of State.
The legislation is sponsored by Republican Senator John McCain and Democrats Ben Cardin and Robert Menendez, all influential legislators.