Biden to warn Putin of economic pain if he invades Ukraine

US president Joe Biden and Russian president Vladimir Putin at a meeting in Switzerland in June (Patrick Semansky/AP)

US president Joe Biden is set to warn Russian president Vladimir Putin that his country will face economy-jarring sanctions if it invades neighbouring Ukraine.

The American leader’s comments were anticipated as he seeks a diplomatic solution to deal with the tens of thousands of Russian troops massed near the Ukraine border.