WASHINGTON — U.S. Representative Dianne Feinstein required a test into whether politics issues rather than pollution was behind the Trump administration's risk this week to retain more than $4 billion in bureaucratic transportation financing from California over claims of poor air quality.

"I am concerned that California is being unfairly targeted," Feinstein, a Democrat who represents the state, said in her letter to Charles Sheehan, agent inspector general of the EPA.

In light of the letter, an EPA representative stated that EPA's activities were not political. They would keep on progressing in the direction of satisfying the strategic the Agency."

On Tuesday, Environmental Protection Agency Administrator Andrew Wheeler sent a letter to California's top air regulator taking steps to retain the government interstate financing, saying the state has neglected to do its most essential assignments under the Clean Air Act, and not created plans to meet targets for air quality goals at the right time.

Feinstein's letter said this issue of accumulated state discharge plans is simply a guise to attack California, as opposed to a good-will effort to help improve California's air quality."

Her letter was the most recent flashpoint among California and the Trump administration over the state's defense of its own stricter clean air and water rules, for example, more tightly vehicle emission models that are trailed by over twelve states.

Feinstein questioned that accumulated state implementation plans were because of California's inaction. She referred to one case where a state plan was anticipating EPA endorsement and another where the state still had one year to agree.

She asked the inspector general to research whether more than three dozen states with comparable issues are being focused on.

"No reports are suggesting that any of those other states received a threat like the one sent to California to their transportation funding," the letter said.

Feinstein said by retention highway financing, the EPA would deny California probably the greatest means to improve air quality.

California had forced severe state constraints on vehicle emissions in defiance of Trump's efforts to move back government clean vehicle regulations. Tailpipe emissions are directed separately from ambient air pollutants, yet California contends the vehicle rules are a must to meet those goals.

Trump's Justice Department this month opened an antitrust test of four noteworthy automakers that struck a transaction this month to embrace California's stricter emissions standards. President Donald Trump said he would take back California's legal authority to set more strict standards.

The administration this year likewise retained $929 million from California's rapid rail project granted in 2010, inciting the state to sue.

On Thursday, EPA's Wheeler blamed California for damaging clean water laws by enabling human waste from homeless occupants to flow into waterways.gainst California