LOS ANGELES — Citizens for Responsibility and Ethics in Washington, a government watchdog group, asked the Office of Congressional Ethics to launch an ethics investigation into a potential conflict of interest involving the author of legislation aimed at killing California's $68 billion high-speed rail project.

The watchdog group questioned why California Rep. David Valadao failed to tell colleagues that the project could affect the property values of his family's Central Valley farmland, according to the organization's prepared statement.

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