On day one of Alejandro Mayorkas' tenure as secretary of the Department of Homeland Security, if he's confirmed as expected, he'll be under pressure from Congress to deliver answers about why the federal government's cybersecurity measures failed to detect or defend against the SolarWinds Orion hack. Mayorkas promised at his confirmation hearing to review the agency's high profile cybersecurity programs, including the network protection program Einstein that's a key component of the National Cybersecurity Protection System. Lawmakers, prior to the discovery of the breach in December, were already signaling for changes to those programs. In recent spending legislation, Congress suggested DHS consider layering other capabilities into Einstein, which is run by the Cybersecurity and Infrastructure Security Agency at DHS.