President Bush surely has the muscle to block legislation this year.

The teachers union will no doubt continue to press its campaign to block voucher legislation.

The upper consultative council has the power to block legislation from the lower house.

Senate rules make it possible for one member to block legislation.

"They still use political money and their contacts to block legislation."

What it would do is give Congressional minorities the power to block most meaningful legislation.

The upper house, which has no say in the Government budget, can still block or slow other legislation.

The president has the power to block legislation with which the executive branch does not agree.

There are certain industries which attempt to block legislation in the interests of their companies.

So, one Senator can't block legislation - it takes about 40.