President Clinton has followed through on his threats to veto a tax break for married couples, signing the veto this morning during a visit to Martha's Vineyard. The vetoed legislation is the cornerstone of the Republican's promises of tax relief, but Clinton, in his weekly radio address, called the Republican efforts "tax giveaways" that would abandon the very fiscal discipline that has created the longest economic expansion ever in U.S. history. Clinton said he vetoed the legislation because it is "the first installation of a fiscally reckless tax strategy."