The BMJ asked the Dept. of Health and Human Services whether this has anything to do with "president" Trump's belief that vaccination causes autism, but got no response.
Now, if you're a Republican, you think that government spending is evil a fortiori because it requires taxation. But you might consider the following information from the linked article:
The $1bn funding also covers all of CDC’s lead exposure testing and risk reduction efforts. CDC estimated that the current rate of lead exposure, with at least 535 000 children with toxic blood concentrations, will cost America $59bn in lost lifetime productivity. Research has shown that each dollar spent on reducing exposure to lead delivers a return of $17 to $221.5
But it's more important that rich people not pay taxes.CDC has estimated that vaccination among American children born from 1994 to 2013 would prevent around 21 million admissions to hospital and 732 000 deaths over the course of their lifetimes, with a net savings of $295bn in direct costs and $1.38 trillion in total societal costs.6