<sod >Â  Taking aim at the Prime Minister, who has doggedly stuck to her ambition of reducing net migration to the tens of thousands, he said: "Pursuing Brexit in the partisan interest might make Tory party management easier in the short run. "But as David Cameron could tell Theresa May, stray too far from the national interest, and you will be found out in the end.< eod>< sod > Â  Taking aim at the Prime Minister, who has doggedly stuck to her ambition of reducing net migration to the tens of thousands, he said: âPursuing Brexit in the partisan interest might make Tory party management easier in the short run.< eod>