Brexit talks stall before midweek EU summit

BRUSSELS/LONDON (Reuters) - The stubborn problem of Britain's land border with Ireland thwarted a drive to clinch a Brexit deal before a European Union summit this week, as negotiators admitted defeat after marathon talks and pressed pause for the coming days.EU negotiator Michel Barnier said after meeting British Brexit Secretary Dominic Raab that they could still not bridge a gap between his "backstop" demands that Northern Ireland stay in the EU's economic zone if there is a risk that border