Top Senate Republicans on Thursday called for Democrats to hold a public hearing on the border crisis and question Homeland Security Secretary Alejandro Mayorkas. “While we may not agree on the causes of or the solutions to this crisis, we believe it is vitally important for the Senate Judiciary Committee to exercise its oversight authority and seek testimony from Secretary Mayorkas and relevant officials at U.S. Customs and Border Protection (CBP), U.S. Immigration and Customs Enforcement (ICE), and the Department of Health and Human Services regarding the situation at the border and the Biden Administration’s response to it,” Sens. Chuck Grassley (R-Iowa) and John Cornyn (R-Texas) wrote in a letter. “Our recent visit to the Rio Grande Valley Sector of the southern border only served to reaffirm our view that the situation has gotten exponentially worse in the last three months, becoming a crisis, and that the Judiciary Committee should …