Yes, from the perspective here the travel ban is a right measure , though it is a little strange to single out the eu versus other countries. Reeks of him trying to pin it on foreign forces without stepping measures up in the us appropriatly. European countries should think about the same ban for flights from the us because less travel is generally helpful in these times and i guess we are far from the peak in the us.
Edit: reading more about trumps speech the thing seems more about controlling the narrative than the spread of the virus because travel bans seem to be his only measure and he wants to cast the impression that the rise in us cases is due to imported cases and not due to his administrations failures. (like being weeks behind on tests)
Is it? The media here is painting it as an absolute joke stating that travel bans have, at best, a very minor slowing effect and are supported by minimal scientific evidence. That and the fact that the US now has one of the most rapidly escalating internal rates of infection due to the catastrophic handling of the situation to date. It's blatant trump "blame the foreigners" misdirection.