WASHINGTON (AP) — One top national security aide who listened to President Donald Trump’s July call with Ukraine’s president called it “improper.” Another said it was “unusual.” The two testified Tuesday at House impeachment hearings as the inquiry reached deeper into the White House. Lt. Col. Alexander Vindman, an Army officer at the National Security Council, and Jennifer Williams, his counterpart at Vice President Mike Pence’s office, said they had concerns as Trump spoke on July 25 with the newly elected Ukrainian president about political investigations into Democrat Joe Biden. “What I heard was inappropriate,” Vindman told lawmakers. The two led off a pivotal week featuring testimony from nine witnesses in all as the House’s impeachment inquiry accelerates.