The disclosure by Rep. Devin Nunes (R-Tulare), chairman of the&nbsp;House Intelligence Committee,&nbsp;that communications by Trump transition members were inadvertently picked up&nbsp;by U.S. surveillance legally collecting foreign intelligence&nbsp;raises questions that&nbsp;are likely&nbsp;to&nbsp;consume Congress and the White House for months.Among them:Who in the&nbsp;Trump transition team was&nbsp;captured by the surveillance? That's not clear.&nbsp;Nunes gave no names&nbsp;other than to say it was possible that&nbsp;then-President-elect Trump might have been mentioned in classified intelligence reports written at the time. Numerous transition officials could have communicated with foreign&nbsp;ambassadors&nbsp;or&nbsp;others in the United States who&nbsp;were under court-authorized surveillance for counter-intelligence purposes &mdash; and&nbsp;thus inadvertently, but legally,&nbsp;had their communications monitored by U.S. intelligence. White&nbsp;House Chief of Staff Reince Preibus, White House aide Stephen Miller, Trump&rsquo;s son-in-law Jared Kushner and Trump&rsquo;s adult&nbsp;children all&nbsp;played formal roles in Trump&rsquo;s transition, along with many other Trump associates and former government officials. Nunes himself was a member&nbsp;of the transition executive&nbsp;committee.&nbsp;Who were&nbsp;Trump transition members talking to? Again, Nunes&nbsp;didn&rsquo;t say, except to note that the surveillance was not part of an&nbsp;ongoing&nbsp;FBI&nbsp;investigation into whether the Trump campaign&nbsp;coordinated with&nbsp;Russian authorities who were meddling in the election. In addition to foreign diplomats or other obvious contacts, the U.S. intelligence dragnet could include almost any person in the U.S. under court-approved&nbsp;surveillance who was in contact with transition officials or who claimed to have been in contact with Trump&nbsp;transition members.&nbsp;&nbsp;What were they talking about? Again, Nunes didn&rsquo;t say. But it's&nbsp;most likely that the classified&nbsp;intelligence reports that Nunes cited&nbsp;discussed either attempts to influence the incoming Trump administration or policy changes that a foreign government was considering in response to Trump&rsquo;s election. It&rsquo;s also possible that the surveillance picked up discussions about business deals, though that is unlikely to generate intelligence reports&nbsp;unless the communications suggested a crime was being committed.&nbsp;What are the requirements for obtaining a FISA warrant? The FBI asks a special federal court that conducts its proceedings in secret for such a warrant when it has reason to believe that someone in the U.S. is acting as an agent of a foreign power &mdash; in the worst-case scenario, conducting espionage against the U.S.&nbsp;&nbsp;But its also possible to get FISA warrants to intercept routine communications by ambassadors and other foreign officials in the U.S., which seems to be how Trump&rsquo;s former national security advisor, Mike Flynn, was detected on phone calls&nbsp;with Russia&rsquo;s ambassador last year.&nbsp;Aren&rsquo;t the identities of U.S. persons who are picked up inadvertently by surveillance supposed to be protected under the FISA law? Yes. But&nbsp;senior intelligence officials can decide to include their names or other identifying information in classified intelligence reports if they believe that doing so is important for understanding the intelligence, or if it shows clear evidence of a potential crime. This process, known as unmasking, could have happened with the&nbsp;Trump transition team.&nbsp;Nunes said it had, but Rep. Adam Schiff&nbsp;(D-Burbank)&nbsp;said that in most cases he had&nbsp;been told the identities were not unmasked but were obvious. So far, Flynn is the only member of Trump's team who is known to have been picked up by the surveillance.&nbsp;How did Nunes get the information? He said he got it from intelligence sources&nbsp;but did not identify them.&nbsp;&nbsp;Does this mean President Trump was correct to claim on Twitter that he was wiretapped by President Obama? No. There is no evidence of a wiretap at Trump Tower and the intercepts were not aimed at Trump or his aides. They were aimed at foreign intelligence targets&nbsp;with whom they apparently were communicating. A president cannot order an FBI wiretap.&nbsp;&nbsp;What's the impact of all this? At a minimum it has disrupted the House Intelligence Committee's efforts to conduct a bipartisan investigation into Russia's role in the election. Schiff, the ranking Democrat, was furious that Nunes&nbsp;held a news conference and then briefed the president on Wednesday. On Thursday, a committee aide said Nunes had apologized "for not sharing information about the documents he saw with the minority before going public" and that he "pledged to work with them on this issue."