US President Donald Trump said he'll "demand" an investigation into possible infiltration of his campaign for political purposes by the Obama Administration or others.
"I hereby demand, and will do so officially tomorrow, that the Department of Justice look into whether or not the FBI/DOJ infiltrated or surveilled the Trump Campaign for Political Purposes - and if any such demands or requests were made by people within the Obama Administration!" Trump said on Twitter.
His comment comes after House Intelligence Chairman Devin Nunes said US spy agencies crossed a "red line" if they planted a paid informant inside Trump's campaign.
In an interview on Fox News Channel, Nunes said he and Republican colleagues have yet to determine whether there was such an informant, because the Justice Department and FBI continue to withhold documents from them.
But the California lawmaker pointed to what he said were "leaks" behind news reports in recent days that the Federal Bureau of Investigation had used an "informant" to get information regarding the Trump campaign early in its counterintelligence investigation of possible ties to Russia.