WASHINGTON — At a House committee hearing Thursday, an agitated U.S. Transportation Secretary tangled with a California Republican over the need to fund the controversial, partly bond-funded $68 billion bullet train initiative in that state, making clear the Obama administration remains committed to high-speed rail investment.

Testifying before an oversight hearing of the House Committee on Transportation and Infrastructure, LaHood implored lawmakers not to give up on high-speed rail and called for the removal of a Republican-sponsored appropriations measure that banned further federal investment in California's intercity rail project.

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