White House says Donald Trump is 'extremely confident' on wiretap evidence

The White House says President Donald Trump is "extremely confident" that the Justice Department will produce evidence backing up his claim that his predecessor wiretapped his New York skyscraper during the election.

The comments from spokesman Sean Spicer on Tuesday come a day after the Justice Department asked lawmakers for more time to produce that evidence.

The House intelligence committee gave the department until March 20, the first day of its hearings on Russia's interference in the 2016 election and possible contacts between Trump advisers and Russians.

Spicer says the president is confident that information yet to be released will "vindicate him".

Earlier this month, Trump accused President Barack Obama of wiretapping Trump Tower during the campaign.

Obama has denied the explosive allegations and there has been no evidence backing up Trump's claims.