The Defense Department is signaling it may break with decades of precedent and reprogram $2.5 billion to build President Trump's wall on the southern border without the approval of Congress, a move lawmakers say could imperil billions in annual budgetary flexibility granted to the Pentagon. Senior DOD officials received a warning last week from Rep. John Carter (TX), a top Republican appropriator. "I understand the department may not adhere to the cooperative traditions of the administration and Congress, which have...