WASHINGTON — A second top cyber-security official is sounding the alarm over the US’s inadequate response to Russian and other cyberattacks.

Army Lt. General Paul Nakasone told the Senate Armed Services Committee that adversaries that include Russia, China, North Korea and Iran are not facing retribution for their cyberattacks on the US.

“They do not think that much will happen. They don’t fear us. That is not good,” said Nakasone, Trump’s nominee to direct the US Cyber Command and the National Security Agency.

He said his role would be to present options to Trump, but the strategy “emanates from the executive branch.”

Sen. Ben Sasse (R-Neb.) said Nakasone’s assessment that the US doesn’t retaliate when attacked is the “most important” exchange happening at the Capitol.

Sasse said while 80 percent of congressional hearings are “fake” and 90 percent are “pointless,” this one matters because a sense of urgency is “bubbling up” to counterattack.

“We are not responding in any way that is adequate to the challenge that we face,” Sasse said.

On Tuesday, Adm. Mike Rogers, current head of the NSA and U.S. Cyber Command, warned that Russia is still trying to meddle in American elections and the US hasn’t done enough to dissuade such interference.

Nakasone said he agrees with Rogers’s assessment that Russia hasn’t suffered consequences to deter their cyber attacks.

“It has not changed their behavior,” Nakasone said.