Democrats are using the fifth anniversary of the Jan. 6 Capitol attack to blast President Trump, accusing him of inciting the riot and pledging accountability even as he pardoned hundreds of defendants on his first day in office. The 2021 riot, which unfolded as lawmakers were certifying former President Biden’s election victory, sent shock waves through the country — intensifying partisan polarization, prompting a sweeping reassessment of security around Washington and leaving millions of dollars in damage to the Capitol.