Rep. David Cicilline (D-R.I.) told MSNBC on Monday that it will be difficult for the White House to convince him to vote for military action against Syria.

“This will be a very heavy burden for me to persuade me that it is in the national security interests of the U.S. to engage in this military strike,” he said.

Cicilline’s comments highlight the tough road ahead for the Obama administration in winning congressional approval for military action.

Both conservatives and liberals in the House have questioned whether a strike would protect U.S. national security and meet the nation’s interests.

Cicilline asked what the consequences of a strike would be. Some worry attacking Syria could lead to a wider war that would pull the U.S. more deeply into the conflict. Syria and Iran have suggested there would be repercussions for Israel if the U.S. attacks.

Others say that the strike has little chance of changing the outcome of Syria’s civil war. The White House has said it wants to punish Syria for the use of chemical weapons, but does not see the strike as shifting momentum in the war.

The White House has launched an all-out effort to win congressional approval for a strike. It held a classified briefing Sunday on Capitol Hill to provide information to Cicilline and other lawmakers. More than 80 members attended.

Secretary of State John KerryJohn Forbes KerrySeinfeld's Jason Alexander compares Trump dance video to iconic Elaine dance This time, for Democrats, Catholics matter President's job approval is surest sign Trump will lose reelection MORE hit five networks on Sunday to argue for a strike, and President Obama will meet two key senators Monday: Sens. John McCainJohn Sidney McCainMark Kelly releases Spanish ad featuring Rep. Gallego More than 300 military family members endorse Biden Jennifer Lawrence says until Trump she was 'a little Republican' MORE (R-Ariz.) and Lindsey GrahamLindsey Olin GrahamFacebook, Twitter CEOs to testify before Senate Judiciary Committee on Nov. 17 The Hill's Campaign Report: 2020 spending wars | Biden looks to clean up oil comments | Debate ratings are in Jaime Harrison raises million in two weeks for South Carolina Senate bid MORE (R-S.C.), who want the U.S. to take aggressive steps against Syria.

Cicilline on Monday said he needed much more information before making a decision.

“I think everybody recognizes that the use of chemical weapons is horrific, but what we really have to decide is whether or not a military strike will advance or protect the national security interests of the United States,” he said.