The U.S. Consumer Price Index rose very little in April, meaning that the Federal Reserve will not intervene by changing interest rates. The Fed has may receive pressure to lower interest rates in response to low inflation. Economists believe that “temporary” factors may be halting inflation, as rent and healthcare costs have steadily increased. Another factor contributing to low inflation is high worker productivity that has kept labor costs stable.
See "Tame U.S. inflation seen keeping Fed on the sidelines", Lucia Mutikani, Reuters, May 10, 2019