 Complete the following phrase:  The a hrefCDUCSUChristian Democratic UnionChristian Social Uniona CDUCSU, led by Chancellor Angela Merkel, won the highest percentage of the vote with 33, though suffered a large swing against it of more than 8. The Social Democratic Party SPD achieved its worst result since the Second World War with only 21 of the vote. Alternative for Germany AfDwhich was previously unrepresented in the Bundestagbecame the third party in the Bundestag with 12.6 of the vote, whilst the Free Democrats FDP won 10.7 of the vote and returned to the Bundestag after losing all their seats in the 