By CHRISTOPHER RUGABER AP Economics Writer
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WASHINGTON (AP) — Consumer prices in the United States picked up last month, a sign that inflation remains a persistent challenge for the Federal Reserve and for President Joe Biden’s re-election campaign, both of which are counting on a steady easing of price pressures this year.

Prices rose 0.4% from January to February, higher than the previous month’s figure of 0.3%, the Labor Department said Tuesday. Compared with a year earlier, consumer prices rose 3.2% last month, above January’s 3.1% annual pace.

Excluding volatile food and energy prices, so-called “core” prices also climbed 0.4% from January to February, matching the previous month’s rise and a faster pace than is consistent with the Fed’s 2% inflation target. Core inflation is watched especially closely because it typically provides a better read of where inflation is likely headed.

“It’s a disappointment, but not a disaster,” said Eric Winograd, U.S. economist at asset manager AB. “The underlying details are more encouraging than the top-line number, which was boosted by a few volatile categories — the type of prices that tend not to repeat month-to-month.”

Those volatile items include gas prices, which jumped 3.8% just from January to February but are still below their level of a year ago. Air fares surged 3.6% after two months of much smaller increases.