Under pressure over her handling of <a href="https://en.wikipedia.org/wiki/Brexit" id="mwAYM" rel="mw:WikiLink" title="Brexit">Brexit</a>, British Prime Minister <a href="https://en.wikipedia.org/wiki/Theresa_May" id="mwAYQ" rel="mw:WikiLink" title="Theresa May">Theresa May</a> announces her resignation as Leader of the Conservative Party, effective as of June 7.