Story highlights The act would require the White House to submit a report detailing why it was seeking to lift sanctions

The moves underscore concern over Trump's openness to Vladimir Putin

Washington (CNN) A growing number of senators from both parties plan to ratchet up their push to stiffen sanctions on Russia and demand Congress have the final say if President Donald Trump decides to weaken penalties on the country unilaterally.

The move by six senators is the latest warning from Capitol Hill to the new administration over US-Russian relations.

On Wednesday, a group led by Sens. Lindsey Graham, R-South Carolina, and Ben Cardin, D-Maryland, plan to introduce legislation that would impose strict new congressional oversight and veto power over the Trump administration if it decided to lift sanctions on Russia.

The Russia Review Act would require the White House to submit a report detailing why it was seeking to lift sanctions, setting into motion a 120-day review period where Congress could vote to disapprove of easing the penalties on the country, according to a summary of the measure provided to CNN.

Sen. Marco Rubio, a member of the Senate Foreign Relations Committee, is cosponsoring the Graham-Cardin measure, along with Democratic Sens. Claire McCaskill of Missouri, Sherrod Brown of Ohio and Republican John McCain of Arizona.

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