Privacy advocates are sounding the alarm after they say lawmakers tucked a controversial cybersurveillance measure into a key spending bill. Critics say the Cybersecurity Information Sharing Act, or CISA, will expand mass surveillance by allowing corporations to share sensitive user data under the guise of cybersecurity. Major tech companies, including Apple, Google and Twitter, have joined a wave of opposition to CISA. Now the group Fight for the Future is calling on Obama to veto the measure amid reports it was added to the so-called must-pass budget bill Congress is due to take up this week in order to avert a government shutdown.