Senate debate on bipartisan climate package could open new fault lines

The intrigue: Sen. Chuck Schumer, the chamber's top Democrat, is signaling that Democrats will use the debate to highlight differences over climate policy.

• "Senate Republicans who claim to want to do something about climate change face a big test," he said in a statement.

What's next: A Democratic aide said they would push amendments, including:

• The bipartisan energy efficiency package that Sens. Rob Portman and Jeanne Shaheen have been pushing for years.
• Bolstering tax credits for renewables and electric vehicles.

Quick take: Seeing where the GOP votes line up on efforts to expand electric vehicle tax credits should be interesting because the White House explicitly opposes them.

Go deeper: There's hope that Congress may pass energy legislation in 2020