New Delhi, Jan. 8 -- US Senator Lindsey Graham on Tuesday (January 7) said President Donald Trump has given his approval to a bipartisan bill aimed at tightening sanctions on Russia, marking a potential escalation in economic pressure over Moscow's war in Ukraine.

Graham said the bill received Trump's backing after a meeting at the White House.

"After a very productive meeting today with President Trump on a variety of issues, he greenlit the bipartisan Russia sanctions bill that I have been working on for months with Senator Blumenthal and many others," Graham said.

The South Carolina Republican argued the legislation comes at a critical moment in the conflict.

"This will be well-timed, as Ukraine is making concessions for peace and ...