"Everyone knows that health care in the U.S. is expensive, as it comprises 18 percent of the gross domestic product.  Yet Trump said he would increase access to health care, provide better health care, and at the same time reduce costs."--- John Kawamoto
****************************************************************************************************
Not true.
-------------
What Trump has continually stated is that he'd reduce health insurance cost - NOT health care cost.
*
Yes, reduce insurance cost. 
How? 
Allow purchasing health insurance across state lines. 
Why?  
By fostering greater competition among insurers and allowing them to compete nationally - health insurance cost would be lowered.