We are starting to see Green Card processing times lasting up to 3 years.   The Naturalization backlog has doubled since the Trump Administration took over.  As noted deep in the article below:  

​“The proof is in the pudding,” he said. “There are a lot of changes in how applications are being accepted processed and decided, and there’s been no change in the law.”
USCIS was built to roll out legal residency and citizenship for those who qualify and distribute the benefits that come with each, but Meyer said it’s just not happening.
“There’s an intent behind that, and the intent is to delay and slow down and frustrate and complicate the existing immigration process,” he said. “It’s been under the Trump administration that those processes have, in many ways, ground to a halt, and that hasn’t been due to a change in law. That’s been due to a change in agency implementation.”

denverite.com/2018/08/29/denver-families-face-separation-as-legal-immigration-processes-grind-to-a-halt/

As of September 11, 2018, the USCIS will be suspending Premium Processing for certain H-1B Petitions filed at the Vermont and California Service Centers.   This suspension does not apply to cap-exempt H-1B filings or H-1B Extensions filed at the Nebraska Service Center where there has been no change in employment with the same employer.  

It will apply to all H-1B Change of Employer filings, H-1B Amendment, and H-1B Extensions where there has been a change in the conditions of employment.  

For more information, please refer to the link below: 

www.uscis.gov/news/uscis-extends-and-expands-suspension-premium-processing-h-1b-petitions-reduce-delays