WASHINGTON — The Senate on Thursday approved legislation to curtail insider trading of securities by lawmakers and officials in the executive branch, sending the legislation to President Barack Obama to sign into law.

The measure did not include a controversial provision that would have required so-called political intelligence firms to reveal their clients.

The legislation prohibits lawmakers and their families and staff from buying and selling securities based on their possession of nonpublic information.

It also requires lawmakers and a broad group of executive branch and agency officials to report stock and commodities transactions to searchable online databases.

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