Washington: US Attorney-General Jeff Sessions praised President Donald Trump for taking decisive action to fight crime and support law enforcement, only hours after the President levelled one of his strongest attacks yet against the former senator, saying he essentially doesn't exist.

US Attorney General Jeff Sessions. Credit:AP

In prepared remarks for a speech to law enforcement officers in Illinois on Wednesday, Sessions credited Trump's "strong leadership" for policies that are "respecting police again and enforcing our laws."

"Based on my experience meeting with officers like you across the country, I believe that morale has already improved under President Trump," Sessions said, according to his prepared remarks. "I can feel the difference."

It's not a two-way relationship, however, as the latest broadside by Trump against his top law enforcement officer showed.