The letter raised questions about the credibility of the witness.

A few days later, the fears this letter had raised were realized.

Woody Burton said the letter raised $30,000 or more.

"This letter raises the ante a bit more than we're comfortable with," an official said.

But the letter, they said, raised important questions about the appearance of conflict of interest.

"In fact, there is no such clear-cut consensus on the issues the letter raises."

But the letter raises an even more important possibility.

The letter has raised several questions around water coolers, starting with: Is this really necessary?

The letter, however, is raising eyebrows in Democratic circles, where many big donors have reported receiving it.

This letter has raised a great many problems for me.