RTCC: Barack Obama is using his second term to take a hard line on climate change.
He has delivered speeches in sweltering heat, waged war with sceptical Republicans over the future of the Environmental Protection Agency, and raised the hopes of campaigners that he might reject the Keystone XL Pipeline.
But last night, he cemented his commitment to fighting climate change in the only way that really matters: a no-holds-barred rampage on Twitter.
It`s unclear whether the President personally took...