Hopes for a thaw as Poland's Kaczynski meets Merkel

By Justyna Pawlak and Andreas Rinke WARSAW/BERLIN (Reuters) - German Chancellor Angela Merkel visits Warsaw on Tuesday amid signs its conservative rulers are keen to repair the co-operation essential for European Union (EU) attempts to handle economic and political problems ahead. Merkel needs the backing of Poland's government, wary of any increased powers for Brussels, to agree reforms in March, on the 60th anniversary of the founding Rome Treaty. The anniversary falls in the same month Britai