(Reuters) – The Republican-led U.S. House of Representatives approved the Keystone XL pipeline on Friday, but a similar measure struggled to get enough support in the Senate and President Barack Obama indicated he might use his veto if the bill does get through Congress. The legislation, approved by 252 votes to 161, circumvents the need for approval of TransCanada Corp’s (TRP.TO) $8 billion project by the Obama administration, which has been considering it for more than six years. No […]