Conversely...

Lower ballot candidates can make a name for themselves with the conventions. Keynote speeches are often utilized to present a rising star of the party to the American public. Ann Richards 1988 address to the Democratic Convention helped raise her profile for a subsequent run for Texas Governor. New York Governor Mario Cuomo's 1984 appearance at the Democratic Convention made many consider him a good choice for President in later elections. Memorably Barrack Obama's speech raised his profile considerably as a state senator.