I think there are a few reasons for Tusk saying that Corbyn's plan is sensible:
1) He is genuinely glad that Corbyn is being more realistic (just don't mention free movement!)
2) A Norway Plus* deal is something he would want
3) It makes the EU seem like they are willing to negotiate and paints May as the one who is 'blocking' Brexit negotiations
4) He knows this is a live grenade tossed into the ranks of the Tory party, but has realised that being polite and respectful of internal UK politics just means May will politely do nothing until March 29th.
* I really dislike the Norway Plus terminology, since it means something completely different to Norway's relationship. When people originally talked about a Norway deal, they meant membership of EFTA - but it doesn't seem to be used that way anymore. People now use Norway or Norway Plus as shorthand for Customs Union and Single Market - which is bollocks.
Norway is NOT in the customs union, while being in a customs union is Corbyn/Labour's priority and a critical reason for the Irish backstop. They have border posts with Sweden. Geography means there are few roads connecting Norway and Sweden despite the long border (Ireland has many more road-crossing points)
Norway is in EFTA, and we will never (be allowed to) join EFTA.
Norway not only has freedom of movement, but is also in Schengen.
I think the only reason people use "Norway Plus" terminology is because they are afraid to say what they really want and just want to imply a softer Brexit. "Norway Plus" allows you to avoid any counterarguments with "well of course the plus [means/doesn't mean] we [will/won't] be in a [customs union/EFTA/schengen/backstop/included in EU-3rd party trade deals/able to make our own independent trade deals/something about fishing rights/something about north sea oil].
1) He is genuinely glad that Corbyn is being more realistic (just don't mention free movement!)
2) A Norway Plus* deal is something he would want
3) It makes the EU seem like they are willing to negotiate and paints May as the one who is 'blocking' Brexit negotiations
4) He knows this is a live grenade tossed into the ranks of the Tory party, but has realised that being polite and respectful of internal UK politics just means May will politely do nothing until March 29th.
* I really dislike the Norway Plus terminology, since it means something completely different to Norway's relationship. When people originally talked about a Norway deal, they meant membership of EFTA - but it doesn't seem to be used that way anymore. People now use Norway or Norway Plus as shorthand for Customs Union and Single Market - which is bollocks.
Norway is NOT in the customs union, while being in a customs union is Corbyn/Labour's priority and a critical reason for the Irish backstop. They have border posts with Sweden. Geography means there are few roads connecting Norway and Sweden despite the long border (Ireland has many more road-crossing points)
Norway is in EFTA, and we will never (be allowed to) join EFTA.
Norway not only has freedom of movement, but is also in Schengen.
I think the only reason people use "Norway Plus" terminology is because they are afraid to say what they really want and just want to imply a softer Brexit. "Norway Plus" allows you to avoid any counterarguments with "well of course the plus [means/doesn't mean] we [will/won't] be in a [customs union/EFTA/schengen/backstop/included in EU-3rd party trade deals/able to make our own independent trade deals/something about fishing rights/something about north sea oil].