Thursday in politics: Obama attends memorial service in Boston, and more

President Barack Obama and first lady Michelle Obama will attend “Healing Our City: An Interfaith Service” in Boston on Thursday morning.

Obama will speak at the memorial service, which is dedicated to those who were gravely wounded or killed in Monday's bombing near the finish line of the Boston Marathon.

Also worth noting on Thursday: Republican Sens. Jeff Sessions and David Vitter will lead a press conference on immigration security and their concerns over the bipartisan “Gang of Eight” immigration reform proposal; Obama will host a reception at the White House for Greek Independence Day; and former Republican presidential candidate Rick Santorum will speak at the Southwest Indiana Right to Life Banquet.

And then there is this: Labor Secretary nominee Thomas Perez is expected to face tough questions Thursday at his confirmation hearing. GOP critics say he made some questionable decisions as the top civil rights enforcer at the Justice Department.

Sources: Yahoo News’ The Ticket, ABC News, Associated Press and Reuters.