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Good morning.

Here’s what you need to know:

A showdown between government and tech.

Since 2006, most online political activity has been exempt from the rigorous regulations to which paid political advertisements on television, on radio and in print have been subjected for years.

An effort to change that begins today, when a bipartisan bill is to be introduced in the Senate to force Facebook, Google and other companies to disclose who is purchasing online political advertising. The proposal follows revelations that Russian-linked operatives bought deceptive ads before the 2016 election.

For its part, the tech industry — which has fought previous efforts to require such disclosures — is mobilizing lobbyists and lawyers to help shape regulations.