Story highlights Juliette Kayyem: Sessions' recusal is latest signal that Trump can't 'pivot' from the investigation into Russia's meddling

She says don't expect 'smoking gun' -- complex probe will confront twists in search for answers. Trump should welcome this

CNN national security analyst Juliette Kayyem is the author of "Security Mom: An Unclassified Guide to Protecting Our Homeland and Your Home." She is a professor at Harvard's Kennedy School, a former assistant secretary of Homeland Security in the Obama administration and founder of Kayyem Solutions, a security consulting firm. The opinions expressed in this commentary are hers.

(CNN) There is no political pivot away from the Russia story.

Indeed, even as the suddenly "presidential" Donald Trump was basking in acclaim Wednesday for his uncharacteristically measured speech Tuesday night before the joint session of Congress, "Russiagate" was gearing up again.

And by Thursday, under intense political pressure over his meeting with Russia's ambassador, Attorney General Jeff Sessions agreed to recuse himself from any investigation related to the Trump campaign's relationship with Russia in the 2016 election.

JUST WATCHED What questions remain after Sessions' recusal Replay More Videos ... MUST WATCH What questions remain after Sessions' recusal 08:35

The Trump administration has for too long believed that by not talking about the Russia issue, by ducking and pivoting, they could make it go away. But investigations are going forward. The media won't let this go, the public won't let this go, and if the Trump administration insists that it did not collude with Russia to affect the election outcome, it too will not want to let this go until the truth has been brought thoroughly into the light and the American public reassured.

Allow me to catch you up.

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