He said that as a result of the loss of the vote Russian "involvement in this chemical disarmament process should to a large extent guarantee their no further use.
Opposition to military intervention overseas has grown in Britain since the controversial invasion of Iraq in 2003, culminating in a surprise Commons backbench revolt that led to a vote against involvement in the Syrian conflict in 2013.
"And I think it's at least 50/50 whether the House will vote down involvement in the civil war".
Millions of Tweets then flooded Twitter, encouraging Facebook to remove any references to Hillary scoring the popular vote, Russian involvement in the presidential election, anything negative about Melania Trump, and anything positive about Saturday Night Live or Alec Baldwin.
But what is unclear is what action he would take if Congress votes against involvement, our correspondent says.
The BBC's Katy Watson in Washington says it is unclear is what action he would take if Congress votes against involvement.
They completely misread the public's appetite for yet another war and were further blindsided by David Cameron's stunning failure to properly manage a parliamentary vote authorising British involvement in a military strike.
David Cameron summoned MPs to return early from their summer break in order to vote for British involvement in military strikes against Syria within days.
While saying he was "proud" of Obama for coming to Congress for authority, Paul said, "It's at least 50-50 whether tHouseuse will vote down the involvement in the Syrian war".
"A lot of people predict that maybe the youth vote, or youth involvement period, in the election won't be as high in 2008, and that numbers may be low," Barnard acknowledged.
