"The mouth can serve as an early warning system," the report said, signaling trouble elsewhere in the body.

Whether that signaled fresh support or trouble for the budget amendment depended mostly on which senator was talking.

If he isn't elected next winter, it could signal trouble for Bonds five or six years hence.

Cold weather can signal trouble for people with asthma.

Low voter turnout does not automatically signal trouble in democracy.

Lotus began to signal trouble last month when it said introduction of the new 1-2-3 would be delayed a few weeks.

And when the Phillies only led by 2-0 going into the sixth, even a small uprising could have signaled trouble.

That posed a problem, since they could quickly signal trouble to their confederates inside.

The six-year cycle of politics since 1966 consistently has signaled trouble for the party.

The very challenge in the voice, the unearned hostility, signaled trouble.