Former US Attorney General has been named as legal counselor to lead legal fights with the incoming Trump administration, Democratic leaders in the California legislature announced on Wednesday.

Kevin de León, the Democratic leader of the Senate, told The New York Times that they are "very, very serious" and stated that having the former attorney general of US will bring "a lot of firepower in order to prepare to safeguard the values of the people of California."

De León, in his statement, expects the Golden State will challenge the Trump administration on a number of issues, including immigration, criminal justice and the environment, and women and civil rights.

Holder, according to the Senate leader, will be the lead litigator with a team of expert lawyers.

Through his observation on Trump's choice for his administration team, De León concluded that it was very clear that it wasn't just campaign rhetoric, and stated that Trump surrounds himself with people who bring danger to the economy of California.

With proposing legal aid in anticipation of any deportation action by the incoming president, California legislators are showing their strong intent to protect undocumented immigrants.

The lawmakers in the state, according to The Los Angeles Times, are preparing to fight the new Republican administration on healthcare and climate change.

Assembly Speaker Anthony Rendon said that while they are still "don't yet know the harmful proposals the next administration will put forward" but thanks to Donald Trump's campaign, Twitter feed and cabinet appointments, they "do have an idea" of what are they dealing with.

Meanwhile, the hiring of Holder has been dismissed by California Republican as Assembly GOP leader Chad Mayes referred it as a stunt and another distraction. Mayes also said that Trump "did not cause the state's transportation crisis" or play a role for the rocketing housing costs.

According to Mayes, the Dems should focus on solving real-world problem instead of wasting taxpayer money to "score political points" prior the inauguration of Trump in this coming January 20.

Trump is yet to comment on the decision.