British Prime Minister David Cameron won a commitment from the European Parliament chief Tuesday that the assembly will "do its utmost" to back any fair deal on the EU reforms Cameron is seeking this week ahead of a referendum on whether Britain should remain in the EU.<br />Cameron wants European leaders at the two-day summit starting Thursday to boost national decision-making for London, including ways to limit welfare payments to EU workers coming to Britain.<br />The British leader held talks Tuesday amid warnings that any reform package could be vetoed by lawmakers after the referendum because it will not be secured by a change in the EU treaty.<br />Even if European Parliament President Martin Schulz said he wanted any deal to remain within the framework of the EU treaty, he did promise cooperation where possible.