WASHINGTON _ California Sen. Kamala Harris and other Democrats running for president have promised aggressive action to stem the nation's epidemic of gun violence if they win the White House in 2020.
But when it comes to restricting gun access, experts say executive action is unlikely to make a significant dent in the problem, and any steps the president takes unilaterally are likely to be embroiled in legal challenges.
The reality is it's Congress _ not the president _ that holds most of the power on gun policy.