BREAKING OVERNIGHT — “Russian Security Service Detains Wall Street
Journal Reporter,” by WSJ’s Daniel Michaels: “The Federal Security
Service said Thursday it had detained Evan Gershkovich, a U.S. citizen,
in the eastern city of Yekaterinburg. The FSB said in a statement that
Mr. Gershkovich, ‘acting on the instructions of the American side,
collected information constituting a state secret about the activities
of one of the enterprises of the Russian military-industrial complex.’ …

‘The Wall Street Journal is deeply concerned for the safety of Mr.
Gershkovich,’ the Journal said in a statement. Mr. Gershkovich reports
on Russia as part of the Journal’s Moscow bureau.”

“Trump’s lead grows in GOP primary race, now over 50% support,” by Fox
News’ Victoria Balara: “The survey, released Wednesday, finds [Donald]
Trump has doubled his lead since February and is up by 30 points over
Ron DeSantis (54%-24%). Last month, he was up by 15 (43%-28%). No one
else hits double digits.” See the poll

Our colleagues Hailey Fuchs, Clothilde Goujard and Daniel Lippman have a
big investigation up this morning into the transatlantic political
influence machine that TikTok put together as it battles efforts to
regulate or ban the platform because of ties to China.

Read the full story: “How TikTok built a ‘team of Avengers’ to fight for
its life”

And today, VP Kamala Harris is in Tanzania, where she’ll meet with
President Samia Suluhu Hassan, the country’s first female head of state.

But the bulk of Harris’ Africa trip is now over. And from the
administration’s point of view, it was a success — but perhaps not for
the reasons you think.

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Raghu Manavalan is the host and senior editor of POLITICO's Playbook
Daily Briefing.
Jenny Ament is the executive producer of POLITICO Audio.