Misspelling the word "forest" twice in the same tweet, Trump wrote: "Billions of dollars are sent to the State of California for Forrest [sic] fires that, with proper Forrest [sic] Management, would never happen". He said unless the state gets "their act together" he would order FEMA to stop sending money. "It is a disgraceful situation in lives and money!"
Last April, Trump falsely stated that the California government is diverting river water into the Pacific Ocean that could be used to fight forest fires, but he also signaled he will fast-track federal help.
Newsom asked for the report to target prevention measures that would benefit communities of lower socioeconomic status with fire education barriers, a factor that helped make the Camp wildfire in Paradise, California, especially devastating.
House Speaker Nancy Pelosi, a Democrat from California, in her own tweet, called on Republicans to condemn Trump and get him to reassure Californians needed assistance.
"President Trump has already destroyed his administration's credibility by claiming that climate change - which contributes to making these wildfires even more destructive - is a hoax", Grijalva said in a statement.
Wednesday's tweet marked the latest battlefield in an ongoing political war between Trump and the State of California.
The natural disaster was the deadliest, most destructive wildfire in California history, leaving an overall damage cost of $23 billion, according to German insurance company Munich Re. He said fire suppression practices have led to an unhealthy build up of fuel in some of the state's forests, making wildfires easier to spread.
KCAL-TV reported that FEMA has already approved more than $48.7 million in funds to 6,646 applicants affected by the Camp and Woolsey Fires that devastated the state a year ago.
"The immediate problem for fire victims is the first need, and threats to FEMA funding are not helpful and will not solve the longer term forest management regulatory problems", the Richvale Republican said in a prepared statement.
"Disasters and recovery are no time for politics".
Writing on Twitter, Pelosi blasted Trump, saying his "threat insults the memory of scores of Americans who perished in wildfires a year ago & thousands more who lost their homes". Jerry Brown and Gov. -elect Newsom. Jay Inslee and Kate Brown of Washington and OR, respectively, sent a letter to the president asking him to double federal funding for forest management.
November's fire in the northern California town of Paradise was the deadliest USA wildfire in a century, killing at least 85 people and destroying almost 14,000 homes.
The president's tweet came after the Camp Fire ravaged parts of the state in November and resulted in 85 deaths - becoming the costliest and deadliest in history for a state that regularly deals with forest fires.