Hillary Clinton on Monday accused Donald Trump of inviting Russian President Vladimir Putin to “hack into Americans,” with Trump firing back that American cybercapacities have declined under President Obama.

“Increasingly we are seeing cyberattacks coming from states [and] organs of states,” Clinton said in the first presidential debate between the two candidates. “The most recent and troubling of these has been Russia. There is no doubt now that Russia has used cyberattacks against all kinds of organizations in our country.