Axios

The attorney for Andrew Favorov, an executive at a Ukrainian state-owned gas company, said Tuesday that his client will voluntarily meet with federal prosecutors as part of their probe into Rudy Giuliani's finances, AP reports.

The big picture: Prosecutors in the Southern District of New York are looking into whether Giuliani personally profited from a Ukrainian natural gas business backed by his foreign-born associates, Lev Parnas and Igor Fruman, who are alleged to have helped his push for investigations into former Vice President Joe Biden. Favorov's lawyer did not specify when or where the meeting will take place.

Go deeper:

• Trump Inc. leaks on itself
• WSJ: Feds probe Giuliani's personal ties to Ukrainian energy project

The high-stakes fight over vehicle emissions and mileage rules is getting more intense and drawing in new combatants.

Driving the news, part 1: California Gov. Gavin Newsom said the state government would only buy cars for their fleets from automakers that reached a deal with the state on increasing emissions standards.

A newly public federal report finds that 945 Superfund sites — around 60% of the nation's total — could be affected by sea-level rise, wildfires and other climate change-related harms.

Why it matters: The Government Accountability Office report warns of more frequent or intense events that damage the waste sites and "lead to releases of contaminants that could pose risks to human health and the environment."

U.S. carbon emissions from energy rose by 2.7% last year, ending several years of declines, federal Energy Information Administration data confirms.

Why it matters: While emissions have been in a generally downward trend for well over a decade, the report late last week shows how the U.S. is off track to meet its pledges under the Paris climate deal.

California confirmed Monday that it won't buy new government vehicles from automakers who backed President Trump in his carbon emissions war with the state, the New York Times reports. GM, Fiat Chrysler and Toyota are among those set to be affected by the move.

Driving the news: The three big automakers and others announced in October that they were joining the Trump administration's side in litigation over its move to stop California from imposing emissions rules and, by proxy, mileage requirements that are tougher than federal standards, per Axios' Ben Geman.

The Supreme Court on Monday issued an administrative stay blocking House Democrats' subpoena for President Trump's tax returns until both sides can file the necessary legal papers.

Why it matters: The lower court order compelling Trump's longtime accounting firm Mazars USA to turn over the president's financial records will be delayed until the Supreme Court decides whether to take up Trump's appeal. Trump has requested that the Supreme Court protect his financial records from both House investigators and the Manhattan district attorney's office, which is conducting a criminal investigation.

Forget the campaign trail and Congress. The real debate on climate change is happening in the courtrooms.

The big picture: With federal policy gridlocked, advocates are pushing an ever-growing list of long-shot lawsuits blaming big oil companies and the government for the planet’s hot mess.

Ford unveiled a high-performance electric SUV, the Mustang Mach-E, on Sunday ahead of the LA Auto Show, a sign of its new approach to electrification.

Why it matters: The Mach-E is not a "compliance car," like the lackluster Focus Electric compact it previously sold to meet federal fuel economy standards. Instead, the Mach-E is meant to be fast, fun and exciting, like the iconic Ford Mustang sports coupe.