Former White House press secretary Jay Carney fired back at Sean Spicer after the current press secretary said providing evidence to back up President Trump's accusations of wiretapping was "above my pay grade."

Spicer on Tuesday held his first press conference since February, during which he took a handful of questions on Trump's accusation Saturday that former President Obama had wiretapped Trump Tower during the presidential campaign. Trump's accusation did not include any evidence to back it up.

When asked during Tuesday's press briefing whether he could now offer any evidence, Spicer responded, "No, that's above my pay grade."

Carney immediately hit Spicer's statement on Twitter.

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"Actually, his 'pay grade' is the highest possible at WH - same as for chief of staff, national security and other senior personnel," Carney tweeted.

Actually, his "pay grade" is the highest possible at WH - same as for chief of staff, national security and other senior personnel. https://t.co/V3BENwFHjI — Jay Carney (@JayCarney) March 7, 2017

“Terrible! Just found out that Obama had my ‘wires tapped’ in Trump Tower just before the victory. Nothing found. This is McCarthyism!” Trump first tweeted on Saturday.

An Obama spokesman, Kevin Lewis, later responded:

“A cardinal rule of the Obama administration was that no White House official ever interfered with any independent investigation led by the Department of Justice. As part of that practice, neither President Obama nor any White House official ever ordered surveillance on any U.S. citizen. Any suggestion otherwise is simply false.”

Trump's allegation has widened a rift between Trump and his predecessor, according to reports, who made an effort to be cordial during the transition.