While the economy will benefit from continued improvement in "underlying" conditions, the federal government's push to tighten its spending will slow overall growth in 2013, the Congressional Budget Office projects.

In an updated "Budget and Economic Outlook" reported released Tuesday afternoon, the agency forecasts:

-- 1.4 percent growth in gross domestic product this year, vs. 2.3 percent in 2012.

-- 2.6 percent growth in 2014.

-- 4.1 percent growth in 2015.

Meanwhile, the unemployment rate won't come down much:

-- It's expected to average 7.9 percent this year, vs. 8.1 percent in 2012.

-- 7.8 percent in 2013.

-- 7.1 percent in 2015.

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