The White House on Thursday is expected to unveil its proposal to enhance the nation's cybersecurity, laying out plans to require industry to better protect systems that run critical infrastructure like the electrical grid, financial systems and nuclear power plants. The Obama administration also is insisting that companies tell consumers when their personal information has been compromised. According to cybersecurity experts familiar with the plan, the administration's proposed legislation also would instruct federal agencies to more closely monitor their computer networks. Several House and Senate committees have been working on cybersecurity legislation for the past two years, while waiting for...