Safe Schools Improvement Act has 193 co-sponsors
Harkin includes SNDA, SSIA provisions as part of measure
Bill pending in Congress would address deadly problem
Orgs say legislation is 'ideal vehicle' to address bullying
Franken, Casey pledge to bring up measures on floor
Franken, Casey may offer pro-LGBT amendments
Polis expects Senate committee vote on SNDA
Seeking bipartisan support for pro-LGBT changes
SSIA contains provisions against harassment online
Experts say laws can reduce harassment in schools