The Legislature went too far in barring casino owners and executives from making any political campaign contributions, Pennsylvania's highest court ruled Thursday in wiping out what had been touted as a major bulwark against the gambling industry's influence.

The Supreme Court said the law's approach to banning all contributions was an overly broad and harmful attempt to combat corruption -- or even just the appearance of corruption -- that violated the state constitution's guarantee of free speech.

Writing for the 5-1 majority, Chief Justice Ronald D. Castille also said the blanket ban was out of step with the law's intent. In the law, lawmakers wrote it was necessary to prevent corruption that may result from ''large campaign contributions,'' but went on to prohibit all such contributions.

Castille did not rule out the constitutionality of a limited ban that capped political campaign contributions from the gambling industry at a certain amount.

''A statute that limited the size of contributions, rather than absolutely prohibiting any contributions, would be more narrowly drawn to accomplish the stated goal,'' he wrote.