LOL - I tried to find my book last night so I could quote it precisely, but let me do this from memory.

Sometime in late December (?), 50 BC, the Senate took a vote as to whether the proposals that BOTH Caesar and Pompey 'stand down' and dismiss their armies, thus avoiding civil war, should stand. The senators personally divided (a one-on-one) vote, and an overwhelming number of them voted for this proposal, with only a small minority voting nay. In spite of this, the Consul (?Lentulus Crus?) immediately ON HIS OWN INITIATIVE went to Pompey, told him he should take up the position as master of the Republican armies, and fight Caesar.

This has always struck me as totally as much a pro-active mood toward war on the part of, not the Senate, but its leadership, as Caesar's crossing the Rubicon and lead, I believe directly, to his decision to do so.