President Barack Obama will deliver a prime-time address to the nation on Wednesday to discuss his plans for expanding US efforts to confront militants in Iraq and Syria.
Mr Obama will discuss the threat posed by the Islamic State militants and a strategy for "degrading and ultimately destroying" the group, the White House said.
Ahead of his address, Mr Obama is meeting with congressional leaders at the White House.
Officials have said the president is seeking "buy-in" from politicians but they have not specified whether Mr Obama will seek an authorisation for use of force.
The US is already launching air strikes against militants in Iraq, actions taken at the invitation of the Iraqi government and without congressional authorisation.