U.S. Defense Secretary Lloyd Austin has helped bolster Ukraine’s fight against Russia but has argued for limiting military aid.

U.S. Secretary of Defense Lloyd Austin made an unannounced visit to Ukraine’s capital, Kyiv, on Monday, where he met with President Volodymyr Zelenskyy and unveiled a package of $400 million in security aid — the second such package within a week.

The trip comes just two weeks before an election that could determine whether the United States continues its campaign of massive military support.