President Donald Trump is nominating David Cummins to lead the Transportation Security Administration By JESSE BEDAYN Associated Press President Donald Trump on Monday nominated David Cummins to head the Transportation Security Administration — which has had a rocky few months as employees went without paychecks and security lines grew long at airports across the country. Cummins, who worked as a senior vice president at Serco, a government contractor that works with local and federal agencies, would take over a TSA bruised by the longest partial government shutdown in history which ended late last month. During periods of the shutdown, employees at the TSA, currently overseen by acting administrator Ha Nguyen McNeill, went without pay , thousands didn't show up to work and hundreds quit entirely. It left travelers frustrated over delays and missed flights and politicians pointed fingers over who was to blame for shutting down the Department of Homeland Security.…