WASHINGTON - The House voted Wednesday to prevent federal regulators from letting individual broadcast companies own television stations serving nearly half the national TV market, ignoring the preferences of its own Republican leaders and a Bush administration veto threat. By a 400-21 vote, lawmakers approved a spending bill with language blocking a Federal Communications Commission (news - web sites) decision to let companies own TV stations serving up to 45 percent of the country's viewers. The current ceiling is 35 percent. Despite GOP control of the White House, Congress and the FCC (news - web sites), the House vote set...