A FP: by Olivier Knox Olivier Knox — Tue Oct 27, 12:23 pm ET WASHINGTON (AFP) — US President Barack Obama’s Senate allies launched a major push Tuesday behind sweeping legislation to battle climate change, with time running short before a high-stakes global summit in December. “Today, we begin the formal legislative process to lead the world in rolling back the urgent threat of climate change,” said Democratic Senator John Kerry, the lead author of a …