Despite his saying earlier that he wants someone with governing experience as his running mate, Donald Trump is seriously considering Lt. Gen. Michael Flynn (ret.) as his running mate, according to several sources familiar with what Trump is doing. The turn toward a military leader is something Trump himself is interested in, rather than something his advisers are interested in. He thinks it projects "tough and steady" to a broad audience.
The problem with Flynn, however, is that he would have a difficult time convincing many people that he is able to take over the White House at a moment's notice, if the need arose. He has been a career military officer his whole life. His only real executive experience was as Director of the Defense Intelligence Agency for two years. He has never held any elected office. If Trump picks him and Clinton picks Sen. Tim Kaine (D-VA), the contrast will be striking, since Kaine has been mayor of Richmond, governor of Virginia, senator from Virginia, and head of the DNC. He clearly understands how government works. With a pick of Flynn, Trump would be betting that foreign affairs in general and defeating ISIS in particular will so dominate the election that people will overlook the fact that he doesn't have any experience in civilian life in either an executive position or a legislative one.