Putin Labels Goutha Chemical Incident a Rebel Provocation Created to Induce Western Interference, Pledges Russian Help to Syria; Obama Isolated

Will the Senate vote take place tomorrow<?
Can the Senate vote out-do the House vote?

I guess if Obama gets the Senate to approve his war he will no longer need approval from the House?

Is this right or wrong?

Does he need approval from both or would the war be illegal if he out-does a NO majority vote at the House?

No US Constitution specialist here.
Just trying to understand how it goes legally speaking.