May's election landslide in doubt as poll lead slips

By Costas Pitas and Andy BruceLONDON (Reuters) - British Prime Minister Theresa May's ability to deliver a landslide majority in the June 8 election was in doubt on Tuesday after two more opinion polls showed the vote could be much tighter than previously thought.A total of seven polls carried out since the May 22 Manchester attack have shown May's lead over the opposition Labour Party narrowing, with some suggesting she might not win the landslide predicted just a month ago.A poll conducted by