** Poland's blue-chip index WIG20 .WIG20 is down 2.8%, falling the most among country indices in Europe, after U.S. President Donald Trump has paused military aid to Ukraine
** Analysts note the lack of help from the United States to Ukraine adds to geopolitical risks for the entire region
** "Today, the Polish market is also retreating, because here the intensity of such dangers or geopolitical risk is simply increasing also around our country", Erste Group analyst Jakub Szkopek says
** Lenders Alior Bank ALRR.WA, PKO BP PKO.WA, Pekao PEO.WA, retailer LPP LPPP.WA are among top losers, falling between 2.9% and 3.2% at 0912 GMT
** WIG20 is down to its three-week lows, and narrowing its YTD gains to 15.5%
(Reporting by Anna Banacka and Rafal W. Nowak)
((Anna.banacka@thosmonreuters.com))