The House select committee investigating the January 6 Capitol insurrection is still trying to nail down a witness list for an upcoming hearing about former President Donald Trump’s efforts to use the Justice Department to help support his false election fraud claims, according to sources familiar with the matter.The House select committee investigating the January 6 Capitol insurrection is still trying to nail down a witness list for an upcoming hearing about former President Donald Trump’s efforts to use the Justice Department to help support his false election fraud claims, according to sources familiar with the matter.