* Election to check PM's popularity before general vote
* Current president seen re-elected
By Peter Laca
BRATISLAVA, April 2 (Reuters) - Slovakia's president is expected to win a second term in a run-off election on Saturday, in a vote set to test the popularity of Prime Minister Robert Fico a year before a parliamentary poll.
Ivan Gasparovic, president since 2004, was endorsed by Fico and he will face the strongest opposition candidate Iveta Radicova in the contest for the largely ceremonial post.
He won the first round with 46.70 percent of the vote, a robust result, as expected, after the 68-year old lawyer maintained a big lead in opinion polls before the vote.
But Radicova, a 52-year-old sociologist and former Social Affairs Minister in the previous reformist cabinet put forward by the Christian Democrat SDKU faction, got what analysts said was a surprisingly large 38.05 percent in the March vote.
Observers said the vote would indicate the political landscape for the general poll to be held in the summer 2010.
"This, in essence, is a test of popularity of Robert Fico and his Smer party," said Pavel Haulik, a sociologist and the head of MVK polling agency.
"And, maybe even more, it is a test for the opposition of what it can offer for the next election."
The central European state of 5.4 million has lost thousands of jobs as demand drops for its exports -- mainly cars and TV sets -- but has not had to bail out any of its banks.
The leftist Fico, who came to power in 2006 with an agenda of helping the poor, has intensified his efforts to strengthen the government's role in the economy in recent months saying a strong state was the best way to tackle the economic crisis.
Fico has said first ever contraction was possible this year, after 6.4 percent economic growth in 2008, and the unemployment rate is at its highest in two and a half years.
After overseeing Slovakia's euro zone entry in January, Fico is trying to keep the fiscal deficit within the EU's limit while juggling slowing budget revenues and the promise to keep expanded welfare programmes intact.
LOYAL PRESIDENT
Gasparovic has praised Fico's ambition to improve the living standards of those left behind by the market reforms of the previous centre-right administration.
The president raised eyebrows this month when local media played a video footage of him telling a closed-door meeting he was close to Fico's Smer faction and that his defeat would be bad for the ruling coalition.
Analysts said Fico needed a president who would not exercise his right of veto on laws, although parliament can overturn his veto, and who would pick him to lead talks on the new government next year.
"He needs a guarantee that a loyal president would not complicate his executive command," said Grigorij Meseznikov, the head of the Institute for Public Affairs, a think-tank.
"In light of the parliamentary election, Gasparovic in office raises chances that Fico will be asked to form the government. In this respect, Gasparovic is an insurance of power for Fico," Meseznikov said. (Factbox of presidential powers and candidates [
]) (Additional reporting by Martin Santa; Editing by Louise Ireland)