House Speaker Nancy Pelosi (D-Calif.) admitted there is a “humanitarian challenge” at the border but ruled out calling it a full-fledged crisis as throngs of illegal immigrants cross the U.S.-Mexico border, as a Republican senator said it’s the fault of the current administration. “This is a humanitarian challenge to all of us,” Pelosi told ABC News on Sunday and echoed claims by the Department of Homeland Security’s (DHS) chief, Alejandro Mayorkas, in saying that it’s because President Joe Biden’s “administration has inherited [a] broken system at the border, and they are working to correct that in the childrens’ interest.” The DHS has confirmed that more than 3,400 unaccompanied minors are in custody inside detention facilities as of last week. And separately, Customs and Border Protection officials stated there were more than 100,000 attempted illegal crossings in February, an increase from 78,000 who individuals tried to cross in January. It comes as the Biden administration …