Obama plans to address nation on Syria

"Failing to respond to this breach of this international norm would send a signal to rogue nations, authoritarian regimes and terrorist organizations that they can develop and use weapons of mass destruction and not pay a consequence," Obama said. "And that’s not the world that we want to live in."

Obama's decision to address the country from the Oval Office underscores concerns that the administration is losing ground in its bid to secure congressional approval for an attack.

According to The Hill's Whip List, 100 House members are now "no" votes or are leaning against military authorization. Seventy-two of them are Republicans and 28 are Democrats. Only 31 House members — 10 Republicans and 21 Democrats — are "yes" votes or are "leaning yes."

Read more on The Hill.