Senators Ron Wyden of Oregon and Tom Cotton of Arkansas are calling on Senate to provide an annual report on the number of successful hacks of Senate phones and computers. They also want Senate leadership to be notified of any breaches within five days of discovery. As the Senators point out, companies and executive branch agencies are required to disclose breaches, but Congress has no legal obligation to do so.
There's no question that the government is subject to hacking. According to CNET, former Senate Sergeant at Arms Frank Larkin said in 2016, the Senate's IT systems blocked more than 273 million connections from more than 54,000 malicious websites. The last time a Congressional computer breach was made public was in 2009, when then-Florida Senator Bill Nelson's personal computers were hacked. It's certainly in the public's best interest to know when Senators' computers have been hacked, but it's too soon to tell if Wyden and Cotton's initiative will find any support.