Guwahati, Sept. 4 -- US President Donald Trump on Wednesday defended his administration's secondary sanctions on India as a key measure to pressure Russia, while indicating potential additional steps against Moscow.

At the same time, he ruled out any reduction in the 50% punitive tariffs imposed on New Delhi.

Trump made the remarks during a meeting with Polish President Karol Nawrocki at the Oval Office, responding to a journalist's question about whether the sanctions were sufficient.

"Would you say that putting secondary sanctions on India. That cost hundreds of billions of dollars to Russia. You call that no action? And I haven't done phase two yet or phase three," Trump said, without specifying what further measures might entail. ...