DAVENPORT — Hillary Clinton, in a campaign stop in Davenport on Tuesday, said she would take a more aggressive tack in combating gun violence, criticizing Republican rival Jeb Bush in the process.Clinton, who is seeking the Democratic Party’s presidential nomination, held a town hall forum at the RiverCenter, where she took a range of questions dealing with how to rein in big banks, health care and the economy, among other topics.Clinton on Monday unveiled a plan that would tighten regulation of buyers and sellers of guns by bolstering background checks, as well as making it harder for manufacturers and sellers to fight lawsuits.