President Trump’s border wall will cost billions and potentially harm America’s dogged airport defense, Sen. Charles Schumer said Sunday.

The Senate minority leader claimed that money for the US-Mexico border wall will come directly out of Coast Guard and Transportation Security Administration funds. Schumer especially noted the potential loss of contraband-sniffing canine units, which he claims are some of the most efficient tools in law enforcement.

“We know that terrorists are smart; when they find weakness in a particular place, they look to punch holes in it,” Schumer said. “And to slash these programs [is] awful.”