One of the points supporters of the Ex-Im Bank like to make is that other countries have their own versions of the bank to help finance purchases of those countries' exports, and the United States should not "unilaterally disarm." Here's the NY Times:
[M]ost governments around the world support exports in similar ways, and if the United States dismantled the bank unilaterally, as some lawmakers are advocating, American companies could lose billions of dollars in overseas orders and decide to move their operations to other countries that provide generous export financing.
It's true that other countries provide similar export subsidies, but I see this as an opportunity, not a hurdle to getting rid of Ex-Im. Liberalization through international trade negotiations has been struggling in recent years. Getting rid of Ex-Im could give it a boost. If we could end Ex-Im, and then call on our trading partners to follow our lead, it could give trade talks an important and meaningful purpose. In these negotiations, governments often seem reluctant to give up any protectionism until others agree to do so as well. That has not served us well recently; not much liberalization has occurred. It may be time to try something new, and lead the way with a unilateral liberalization proposal, to show the world we actually believe in free trade (they have good reason to doubt this), and encourage others to move in that direction as well.