NATO leaders are expected to endorse a declaration of Ukraine’s “irreversible path” to membership of the alliance on Wednesday, at a summit being held in Washington this week. The portion of text prepared for the summit declaration, seen by dpa on Wednesday, is intended to reassure Ukraine that its “future is in NATO.” Leaders gathered on Tuesday for the first day of the summit, which is set to continue throughout Wednesday and Thursday. The text underscores that Ukraine can only join when all current members agree. The United States and Germany in particular are against rushing the process, d…