 Thanks for spending time with us. President Biden is sounding a familiar theme on the foreign policy front. At a NATO summit in Washington, he promised to forcefully defend Ukraine against Russia's invasion, using the global stage to try to show allies at home and abroad that he can still lead. The 81-year-old Biden has endured 12 days of close examination about his fitness for office, including from fellow Democrats, as some campaign donors fear that his disastrous debate performance late last month will cost him the November election.