Senate Majority Leader Mitch McConnell (R-KY) is not buying President Trump's oft-repeated promise that Mexico will pay for a new border wall.

"Uh, no," McConnell answered this morning in a Politico interview when asked if Mexico will foot the bill for the project.

If constructed, a wall along the U.S.-Mexico border is estimated to cost at least $14 billion, if not much more.

Mexican President Enrique Peña Nieto has made it clear that the country has no intention of paying for the wall, though Trump has refused so far to accept that.

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McConnell praised President Trump's choice of Gen. John Kelly to lead the Department of Homeland Security, but conceded that a wall is "not the best way" to secure some parts of the southern border.

McConnell said he's in favor of enhanced border security and that he believes lawmakers and the administration will follow Kelly's advice on the matter.

He was also asked to respond to Trump's explosive claim that former President Barack Obama ordered a wiretap of Trump Tower during the campaign.

Terrible! Just found out that Obama had my "wires tapped" in Trump Tower just before the victory. Nothing found. This is McCarthyism! — Donald J. Trump (@realDonaldTrump) March 4, 2017

Is it legal for a sitting President to be "wire tapping" a race for president prior to an election? Turned down by court earlier. A NEW LOW! — Donald J. Trump (@realDonaldTrump) March 4, 2017

I'd bet a good lawyer could make a great case out of the fact that President Obama was tapping my phones in October, just prior to Election! — Donald J. Trump (@realDonaldTrump) March 4, 2017

How low has President Obama gone to tapp my phones during the very sacred election process. This is Nixon/Watergate. Bad (or sick) guy! — Donald J. Trump (@realDonaldTrump) March 4, 2017

"There's no evidence of that," he said, adding that the Senate Intelligence Committee should investigate it, along with Russia's overall interference in the election.

Watch the clips above and below.

.@SenateMajLdr on Trump's claim that Obama wiretapped Trump Tower: "There’s no evidence of that” #PlaybookInterview pic.twitter.com/bqnUGkJomx — POLITICO Live (@POLITICOLive) March 9, 2017

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