The Congressional Budget Office, the nonpartisan analysis arm of Congress, said in its latest report that the federal government's tax and spending policies would not constrain economic growth as much as they had in 2013.
And state and local governments were expected to increase spending after several years of budget tightening, the CBO said.
In its economic and budget outlook report for 2014 to 2024, the CBO predicted growth in gross domestic product (GDP) at 3.1 per cent this year and 3.4 per cent in 2015 and 2016.
Beyond 2017, CBO expects that economic growth will diminish to a pace that is well below the average seen over the past several decades.
The CBO predicted the unemployment rate would end this year at 6.7 per cent, unchanged from December 2013, and decline only gradually, dropping below 6.0 per cent in 2017.