Army Secretary Daniel Driscoll, left, and Army Chief of Staff Gen. Randy George meet with House lawmakers on Wednesday. (Jacquelyn Martin/AP) By Abigail Hauslohner and Olivia George

The U.S. Army’s top leaders encountered bipartisan frustration from House lawmakers Wednesday, as they sought to sell Congress on the Trump administration’s ambitious-if-vague modernization plans for the service that members of both parties said they want to support but can’t without the critical budgetary blueprint required to fund the vision.

“The committee is willing to work with you,” House Armed Services Committee Chairman Rep. Mike D. Rogers (R-Alabama) told Army Secretary Daniel P. Driscoll, who was joined at the hearing by Gen. Randy A. George, the Army chief of staff. “But we need to see your ma

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