In 2017 12.2% of Americans (3.2 million) did not have health insurance, a 1.3% increase from 2016. This is the largest jump in uninsured since these numbers started being tracked in 2008.
There could be a number of reasons for this. Some say it is because insurance providers are pulling out of the ACA marketplace. Others say it is because of the uncertainty of the future of the ACA. Yet others believe that Trump has already repealed it.
One thing that is commonly consented on is these numbers are likely to raise.
http://news.gallup.com/poll/225383/uninsured-rate-steady-fourth-quarter-2017.aspx
