Defense Secretary Jim Mattis urged President Trump to get congressional approval before the United States launched airstrikes against Syria last week, but was overruled by Mr. Trump, who wanted a rapid and dramatic response, military and administration officials said. Mr. Trump, the officials said, wanted to be seen as backing up a series of bellicose tweets with action, but was warned that an overly aggressive response risked igniting a wider war with Russia. Friday night’s limited strikes on three targets, which lasted under two minutes, were the compromise.