Greenwire: Four powerful House Democrats warned President Obama today against using a fast-track budget process for climate legislation. House Energy and Commerce Chairman Henry Waxman of California and Reps. Ed Markey of Massachusetts, John Dingell of Michigan and Rick Boucher of Virginia insist in a letter (pdf) that Obama’s climate agenda has a better chance of success if it is done through regular order. “Energy and environment issues have a unique regional component,” the lawmakers …