Raphael Satter (Adds details from hearing beginning) WASHINGTON, Feb 26 (Reuters) - A senior Democratic lawmaker said there is a growing appetite for a new federal cybersecurity breach notification law in the wake of a sprawling series of digital intrusions blamed on the Russian government. The comment, made by Mississippi Representative Bennie Thompson, the chairman of the House’s Homeland Security Committee, comes as cybersecurity executives are facing their second round of congressional questions on Friday over their companies’ roles in the breach centered on Texas software company SolarWinds. Introducing the witnesses, Thompson said that there was “growing interest in a cybersecurity reporting law” from his colleagues and that he hoped “we can enact cyber incident notification legislation in the short order.”