Former Sen. John Sununu (R) will headline an afternoon fundraiser on June 23 for the New Hampshire GOP. The appearance has caught notice among Granite State Republicans as a possible first step back into electoral politics, perhaps to challenge to Sen. Jeanne Shaheen (D) in 2014.

Should Sununu run, it would be a rematch of his 2008 race with Shaheen. The former governor beat Sununu after he had served just one Senate term, joining the ranks of many other Democrats who won that year in what was a wave election for the party.

In March, Shaheen’s office confirmed to Foster’s Daily Democrat that she plans to run for re-election, despite raising very little money at this point in her first term.

So far in this cycle, Shaheen has raised about $265,000, and she had about $150,000 in cash on hand at the end of the first quarter.

New Hamsphire is a swing state. Two years after Shaheen beat Sununu by 7 points, Granite State voters supported now-Sen. Kelly Ayotte (R). Sununu is the son of former Gov. John Sununu, an influential figure in New Hampshire Republican politics and top adviser to presumptive GOP presidential nominee Mitt Romney.