The extension of the National Guard deployment in Washington, D.C. until January 2029 will cost roughly $1.4 billion, according to a Defense Department estimate provided to Congress. The figure offers a glimpse of how much taxpayer money will be spent on a deployment that has been criticized by local officials as an infringement of their city’s autonomy and by Democrats who say it has militarized the streets of nation’s capital at the public’s expense. The cost estimate is for fiscal years 2027-2029 and came in response to questions from Massachusetts Democratic Sen. Elizabeth Warren and was provided to The Associated Press.