WASHINGTON - US President Donald Trump is facing a showdown with Congress after lawmakers overwhelmingly approved a bill of sanctions against Russia, Iran and the Democratic People's Republic of Korea.

As the bill, gaining bipartisan support in Congress, was likely to pass the Senate soon, Trump would have to decide whether or not to sign the legislation that would restrain his power of easing Russian sanctions imposed by the Barack Obama administration last year.

According to the bill, Congress will have power to veto any decision made by the president that would "significantly alter" US foreign policy in connection with Russia.