The explosions occurred in public squares, markets and outside restaurants in the city of Jalalabad.
Afghan and international forces killed more than 700 civilians in the first six months of the year.
The attack against the Green Trend party headquarters lasted for hours and claimed the lives of at least 20 people.
Federal prosecutors say Delowar Mohammed Hossain, 33, was trying to get to Afghanistan so he could kill U.S. soldiers through the Islamic group.
A tussle between Reps. Tim Ryan and Tulsi Gabbard over Afghanistan shows the party isn't yet being honest about what it does when it gains power.
Seen as a rising Democratic star, he dropped out of Kansas City, Missouri, mayor's race last year.
"Some of you will join the fight on the Korean Peninsula ... where North Korea continues to threaten the peace," the vice president said.
The mounting challenges show the limits of Trump's self-touted ability to make a deal.
They've risked their lives working for the American military abroad, yet the number of interpreters being granted U.S. visas has fallen sharply.
Afghan forces and their allies were responsible for more than half of all civilian deaths in the first three months of 2019.
The Taliban claimed responsibility for the attack, which left three American soldiers dead and one Afghan contractor injured.
The fatalities bring to four the number of U.S. soldiers killed so far this year in Afghanistan.
A big, bipartisan majority voiced opposition to a "precipitous" military drawdown in Syria and Afghanistan. Democratic presidential contenders sided with Trump.
Most Senate Democrats likely to or already declared as running for president in 2020 opposed the move.
HuffPost contacted a dozen likely presidential candidates to ask where they stand.
The House speaker cited "the grave threats caused by the President’s action."
He sounded pretty high, too, talking about the Soviet invasion of Afghanistan.
But the senator criticized Trump's sudden tweet on Syria and his failure to discuss his plans with America's allies.
"It's important for me to work for people who I think are basically honest," he said.
But if the troop pullout proceeds amid Trump-style chaos, advocates for a less hawkish foreign policy could face a big setback.